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Finding the Fourth Proportional to 92,081.88, 138,095.55 and 39,478.86

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Solution

The fourth proportional to 92,081.88, 138,095.55 and 39,478.86 is: 59,206.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,081.88 : 138,095.55 = 39,478.86 : x
  2. Step 2: Convert to fraction form
    92,081.88/138,095.55 = 39,478.86/x
  3. Step 3: Cross multiply
    92,081.88x = 138,095.55 × 39,478.86
  4. Step 4: Simplify right side
    92,081.88x = 5,451,854,885.07
  5. Step 5: Solve for x
    x = 5,451,854,885.07/92,081.88
  6. Step 6: Final answer
    x = 59,206.60

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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.