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Finding the Fourth Proportional to 61,407.60, 91,892.70 and 42,599.40

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Solution

The fourth proportional to 61,407.60, 91,892.70 and 42,599.40 is: 63,747.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,407.60 : 91,892.70 = 42,599.40 : x
  2. Step 2: Convert to fraction form
    61,407.60/91,892.70 = 42,599.40/x
  3. Step 3: Cross multiply
    61,407.60x = 91,892.70 × 42,599.40
  4. Step 4: Simplify right side
    61,407.60x = 3,914,573,884.38
  5. Step 5: Solve for x
    x = 3,914,573,884.38/61,407.60
  6. Step 6: Final answer
    x = 63,747.38

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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.