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Finding the Fourth Proportional to 42,690.60, 63,890.10 and 37,441.80

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Solution

The fourth proportional to 42,690.60, 63,890.10 and 37,441.80 is: 56,034.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,690.60 : 63,890.10 = 37,441.80 : x
  2. Step 2: Convert to fraction form
    42,690.60/63,890.10 = 37,441.80/x
  3. Step 3: Cross multiply
    42,690.60x = 63,890.10 × 37,441.80
  4. Step 4: Simplify right side
    42,690.60x = 2,392,160,346.18
  5. Step 5: Solve for x
    x = 2,392,160,346.18/42,690.60
  6. Step 6: Final answer
    x = 56,034.83

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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.