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Finding the Fourth Proportional to 68,434.40, 93,753.55 and 65,875.87

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Solution

The fourth proportional to 68,434.40, 93,753.55 and 65,875.87 is: 90,248.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,434.40 : 93,753.55 = 65,875.87 : x
  2. Step 2: Convert to fraction form
    68,434.40/93,753.55 = 65,875.87/x
  3. Step 3: Cross multiply
    68,434.40x = 93,753.55 × 65,875.87
  4. Step 4: Simplify right side
    68,434.40x = 6,176,096,272.76
  5. Step 5: Solve for x
    x = 6,176,096,272.76/68,434.40
  6. Step 6: Final answer
    x = 90,248.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.