Home / 77,790.70-116,426.85-71,569.90

Finding the Fourth Proportional to 77,790.70, 116,426.85 and 71,569.90

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Solution

The fourth proportional to 77,790.70, 116,426.85 and 71,569.90 is: 107,116.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,790.70 : 116,426.85 = 71,569.90 : x
  2. Step 2: Convert to fraction form
    77,790.70/116,426.85 = 71,569.90/x
  3. Step 3: Cross multiply
    77,790.70x = 116,426.85 × 71,569.90
  4. Step 4: Simplify right side
    77,790.70x = 8,332,658,011.82
  5. Step 5: Solve for x
    x = 8,332,658,011.82/77,790.70
  6. Step 6: Final answer
    x = 107,116.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.