Home / 85,834,818.30-128,752,227.45-76,428,968.70

Finding the Fourth Proportional to 85,834,818.30, 128,752,227.45 and 76,428,968.70

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Solution

The fourth proportional to 85,834,818.30, 128,752,227.45 and 76,428,968.70 is: 114,643,453.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,834,818.30 : 128,752,227.45 = 76,428,968.70 : x
  2. Step 2: Convert to fraction form
    85,834,818.30/128,752,227.45 = 76,428,968.70/x
  3. Step 3: Cross multiply
    85,834,818.30x = 128,752,227.45 × 76,428,968.70
  4. Step 4: Simplify right side
    85,834,818.30x = 9,840,399,961,831,332
  5. Step 5: Solve for x
    x = 9,840,399,961,831,332/85,834,818.30
  6. Step 6: Final answer
    x = 114,643,453.05

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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.