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Finding the Fourth Proportional to 64,615.77, 89,132.49 and 40,374.63

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Solution

The fourth proportional to 64,615.77, 89,132.49 and 40,374.63 is: 55,693.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,615.77 : 89,132.49 = 40,374.63 : x
  2. Step 2: Convert to fraction form
    64,615.77/89,132.49 = 40,374.63/x
  3. Step 3: Cross multiply
    64,615.77x = 89,132.49 × 40,374.63
  4. Step 4: Simplify right side
    64,615.77x = 3,598,691,304.73
  5. Step 5: Solve for x
    x = 3,598,691,304.73/64,615.77
  6. Step 6: Final answer
    x = 55,693.70

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1.5x scale

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.