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Finding the Fourth Proportional to 62,916.60, 86,780.52 and 42,761.64

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Solution

The fourth proportional to 62,916.60, 86,780.52 and 42,761.64 is: 58,980.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,916.60 : 86,780.52 = 42,761.64 : x
  2. Step 2: Convert to fraction form
    62,916.60/86,780.52 = 42,761.64/x
  3. Step 3: Cross multiply
    62,916.60x = 86,780.52 × 42,761.64
  4. Step 4: Simplify right side
    62,916.60x = 3,710,877,355.25
  5. Step 5: Solve for x
    x = 3,710,877,355.25/62,916.60
  6. Step 6: Final answer
    x = 58,980.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.