Home / 1,121,859,002.78-1,690,446,011.90-921,867,125.66

Finding the Fourth Proportional to 1,121,859,002.78, 1,690,446,011.90 and 921,867,125.66

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Solution

The fourth proportional to 1,121,859,002.78, 1,690,446,011.90 and 921,867,125.66 is: 1,389,093,105.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,859,002.78 : 1,690,446,011.90 = 921,867,125.66 : x
  2. Step 2: Convert to fraction form
    1,121,859,002.78/1,690,446,011.90 = 921,867,125.66/x
  3. Step 3: Cross multiply
    1,121,859,002.78x = 1,690,446,011.90 × 921,867,125.66
  4. Step 4: Simplify right side
    1,121,859,002.78x = 1,558,366,606,073,663,232
  5. Step 5: Solve for x
    x = 1,558,366,606,073,663,232/1,121,859,002.78
  6. Step 6: Final answer
    x = 1,389,093,105.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.