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Finding the Fourth Proportional to 191,088.72, 286,748.28 and 66,517.20

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Solution

The fourth proportional to 191,088.72, 286,748.28 and 66,517.20 is: 99,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,088.72 : 286,748.28 = 66,517.20 : x
  2. Step 2: Convert to fraction form
    191,088.72/286,748.28 = 66,517.20/x
  3. Step 3: Cross multiply
    191,088.72x = 286,748.28 × 66,517.20
  4. Step 4: Simplify right side
    191,088.72x = 19,073,692,690.42
  5. Step 5: Solve for x
    x = 19,073,692,690.42/191,088.72
  6. Step 6: Final answer
    x = 99,815.90

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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.