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Finding the Fourth Proportional to 145,638.32, 218,542.39 and 61,393.32

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Solution

The fourth proportional to 145,638.32, 218,542.39 and 61,393.32 is: 92,125.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,638.32 : 218,542.39 = 61,393.32 : x
  2. Step 2: Convert to fraction form
    145,638.32/218,542.39 = 61,393.32/x
  3. Step 3: Cross multiply
    145,638.32x = 218,542.39 × 61,393.32
  4. Step 4: Simplify right side
    145,638.32x = 13,417,042,729.35
  5. Step 5: Solve for x
    x = 13,417,042,729.35/145,638.32
  6. Step 6: Final answer
    x = 92,125.78

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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.