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Finding the Fourth Proportional to 61,661.32, 92,319.42 and 39,418.76

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Solution

The fourth proportional to 61,661.32, 92,319.42 and 39,418.76 is: 59,017.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,661.32 : 92,319.42 = 39,418.76 : x
  2. Step 2: Convert to fraction form
    61,661.32/92,319.42 = 39,418.76/x
  3. Step 3: Cross multiply
    61,661.32x = 92,319.42 × 39,418.76
  4. Step 4: Simplify right side
    61,661.32x = 3,639,117,060.32
  5. Step 5: Solve for x
    x = 3,639,117,060.32/61,661.32
  6. Step 6: Final answer
    x = 59,017.83

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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.