Home / 85,890,363.40-128,835,545.10-76,484,513.80

Finding the Fourth Proportional to 85,890,363.40, 128,835,545.10 and 76,484,513.80

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Solution

The fourth proportional to 85,890,363.40, 128,835,545.10 and 76,484,513.80 is: 114,726,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,363.40 : 128,835,545.10 = 76,484,513.80 : x
  2. Step 2: Convert to fraction form
    85,890,363.40/128,835,545.10 = 76,484,513.80/x
  3. Step 3: Cross multiply
    85,890,363.40x = 128,835,545.10 × 76,484,513.80
  4. Step 4: Simplify right side
    85,890,363.40x = 9,853,924,027,131,472
  5. Step 5: Solve for x
    x = 9,853,924,027,131,472/85,890,363.40
  6. Step 6: Final answer
    x = 114,726,770.70

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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.