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Finding the Fourth Proportional to 40,248.40, 60,421.20 and 39,956.80

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Solution

The fourth proportional to 40,248.40, 60,421.20 and 39,956.80 is: 59,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,248.40 : 60,421.20 = 39,956.80 : x
  2. Step 2: Convert to fraction form
    40,248.40/60,421.20 = 39,956.80/x
  3. Step 3: Cross multiply
    40,248.40x = 60,421.20 × 39,956.80
  4. Step 4: Simplify right side
    40,248.40x = 2,414,237,804.16
  5. Step 5: Solve for x
    x = 2,414,237,804.16/40,248.40
  6. Step 6: Final answer
    x = 59,983.45

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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.