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Finding the Fourth Proportional to 66,438.40, 99,657.60 and 34,805.20

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Solution

The fourth proportional to 66,438.40, 99,657.60 and 34,805.20 is: 52,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.40 : 99,657.60 = 34,805.20 : x
  2. Step 2: Convert to fraction form
    66,438.40/99,657.60 = 34,805.20/x
  3. Step 3: Cross multiply
    66,438.40x = 99,657.60 × 34,805.20
  4. Step 4: Simplify right side
    66,438.40x = 3,468,602,699.52
  5. Step 5: Solve for x
    x = 3,468,602,699.52/66,438.40
  6. Step 6: Final answer
    x = 52,207.80

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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.