Home / 85,832,958.30-128,749,437.45-76,427,108.70

Finding the Fourth Proportional to 85,832,958.30, 128,749,437.45 and 76,427,108.70

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Solution

The fourth proportional to 85,832,958.30, 128,749,437.45 and 76,427,108.70 is: 114,640,663.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,832,958.30 : 128,749,437.45 = 76,427,108.70 : x
  2. Step 2: Convert to fraction form
    85,832,958.30/128,749,437.45 = 76,427,108.70/x
  3. Step 3: Cross multiply
    85,832,958.30x = 128,749,437.45 × 76,427,108.70
  4. Step 4: Simplify right side
    85,832,958.30x = 9,839,947,251,055,002
  5. Step 5: Solve for x
    x = 9,839,947,251,055,002/85,832,958.30
  6. Step 6: Final answer
    x = 114,640,663.05

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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.