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Finding the Fourth Proportional to 42,641.20, 63,904.20 and 37,687.60

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Solution

The fourth proportional to 42,641.20, 63,904.20 and 37,687.60 is: 56,480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,641.20 : 63,904.20 = 37,687.60 : x
  2. Step 2: Convert to fraction form
    42,641.20/63,904.20 = 37,687.60/x
  3. Step 3: Cross multiply
    42,641.20x = 63,904.20 × 37,687.60
  4. Step 4: Simplify right side
    42,641.20x = 2,408,395,927.92
  5. Step 5: Solve for x
    x = 2,408,395,927.92/42,641.20
  6. Step 6: Final answer
    x = 56,480.49

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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.