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Finding the Fourth Proportional to 142,607.79, 213,842.46 and 71,499.88

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Solution

The fourth proportional to 142,607.79, 213,842.46 and 71,499.88 is: 107,215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,607.79 : 213,842.46 = 71,499.88 : x
  2. Step 2: Convert to fraction form
    142,607.79/213,842.46 = 71,499.88/x
  3. Step 3: Cross multiply
    142,607.79x = 213,842.46 × 71,499.88
  4. Step 4: Simplify right side
    142,607.79x = 15,289,710,228.90
  5. Step 5: Solve for x
    x = 15,289,710,228.90/142,607.79
  6. Step 6: Final answer
    x = 107,215.11

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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.