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Finding the Fourth Proportional to 42,308.60, 63,462.90 and 40,364.60

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Solution

The fourth proportional to 42,308.60, 63,462.90 and 40,364.60 is: 60,546.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,308.60 : 63,462.90 = 40,364.60 : x
  2. Step 2: Convert to fraction form
    42,308.60/63,462.90 = 40,364.60/x
  3. Step 3: Cross multiply
    42,308.60x = 63,462.90 × 40,364.60
  4. Step 4: Simplify right side
    42,308.60x = 2,561,654,573.34
  5. Step 5: Solve for x
    x = 2,561,654,573.34/42,308.60
  6. Step 6: Final answer
    x = 60,546.90

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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.