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Finding the Fourth Proportional to 66,487.60, 99,697.20 and 19,734.40

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Solution

The fourth proportional to 66,487.60, 99,697.20 and 19,734.40 is: 29,591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,487.60 : 99,697.20 = 19,734.40 : x
  2. Step 2: Convert to fraction form
    66,487.60/99,697.20 = 19,734.40/x
  3. Step 3: Cross multiply
    66,487.60x = 99,697.20 × 19,734.40
  4. Step 4: Simplify right side
    66,487.60x = 1,967,464,423.68
  5. Step 5: Solve for x
    x = 1,967,464,423.68/66,487.60
  6. Step 6: Final answer
    x = 29,591.45

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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.