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Finding the Fourth Proportional to 60,291.16, 90,492.72 and 30,731.20

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Solution

The fourth proportional to 60,291.16, 90,492.72 and 30,731.20 is: 46,125.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,291.16 : 90,492.72 = 30,731.20 : x
  2. Step 2: Convert to fraction form
    60,291.16/90,492.72 = 30,731.20/x
  3. Step 3: Cross multiply
    60,291.16x = 90,492.72 × 30,731.20
  4. Step 4: Simplify right side
    60,291.16x = 2,780,949,876.86
  5. Step 5: Solve for x
    x = 2,780,949,876.86/60,291.16
  6. Step 6: Final answer
    x = 46,125.33

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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.