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Finding the Fourth Proportional to 80,510.40, 120,688.80 and 62,731.20

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Solution

The fourth proportional to 80,510.40, 120,688.80 and 62,731.20 is: 94,036.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,510.40 : 120,688.80 = 62,731.20 : x
  2. Step 2: Convert to fraction form
    80,510.40/120,688.80 = 62,731.20/x
  3. Step 3: Cross multiply
    80,510.40x = 120,688.80 × 62,731.20
  4. Step 4: Simplify right side
    80,510.40x = 7,570,953,250.56
  5. Step 5: Solve for x
    x = 7,570,953,250.56/80,510.40
  6. Step 6: Final answer
    x = 94,036.96

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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.