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Finding the Fourth Proportional to 145,374.40, 217,915.80 and 66,545.20

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Solution

The fourth proportional to 145,374.40, 217,915.80 and 66,545.20 is: 99,751.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,374.40 : 217,915.80 = 66,545.20 : x
  2. Step 2: Convert to fraction form
    145,374.40/217,915.80 = 66,545.20/x
  3. Step 3: Cross multiply
    145,374.40x = 217,915.80 × 66,545.20
  4. Step 4: Simplify right side
    145,374.40x = 14,501,250,494.16
  5. Step 5: Solve for x
    x = 14,501,250,494.16/145,374.40
  6. Step 6: Final answer
    x = 99,751.06

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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.