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Finding the Fourth Proportional to 71,710.21, 99,000.63 and 54,579.93

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Solution

The fourth proportional to 71,710.21, 99,000.63 and 54,579.93 is: 75,351.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,710.21 : 99,000.63 = 54,579.93 : x
  2. Step 2: Convert to fraction form
    71,710.21/99,000.63 = 54,579.93/x
  3. Step 3: Cross multiply
    71,710.21x = 99,000.63 × 54,579.93
  4. Step 4: Simplify right side
    71,710.21x = 5,403,447,084.10
  5. Step 5: Solve for x
    x = 5,403,447,084.10/71,710.21
  6. Step 6: Final answer
    x = 75,351.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.