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Finding the Fourth Proportional to 85,864.76, 118,545.90 and 68,031.80

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Solution

The fourth proportional to 85,864.76, 118,545.90 and 68,031.80 is: 93,925.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,864.76 : 118,545.90 = 68,031.80 : x
  2. Step 2: Convert to fraction form
    85,864.76/118,545.90 = 68,031.80/x
  3. Step 3: Cross multiply
    85,864.76x = 118,545.90 × 68,031.80
  4. Step 4: Simplify right side
    85,864.76x = 8,064,890,959.62
  5. Step 5: Solve for x
    x = 8,064,890,959.62/85,864.76
  6. Step 6: Final answer
    x = 93,925.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.