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Finding the Fourth Proportional to 66,560.70, 99,731.70 and 56,719.20

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Solution

The fourth proportional to 66,560.70, 99,731.70 and 56,719.20 is: 84,985.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,560.70 : 99,731.70 = 56,719.20 : x
  2. Step 2: Convert to fraction form
    66,560.70/99,731.70 = 56,719.20/x
  3. Step 3: Cross multiply
    66,560.70x = 99,731.70 × 56,719.20
  4. Step 4: Simplify right side
    66,560.70x = 5,656,702,238.64
  5. Step 5: Solve for x
    x = 5,656,702,238.64/66,560.70
  6. Step 6: Final answer
    x = 84,985.62

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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.