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Finding the Fourth Proportional to 147,280.76, 220,715.20 and 79,666.83

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Solution

The fourth proportional to 147,280.76, 220,715.20 and 79,666.83 is: 119,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,280.76 : 220,715.20 = 79,666.83 : x
  2. Step 2: Convert to fraction form
    147,280.76/220,715.20 = 79,666.83/x
  3. Step 3: Cross multiply
    147,280.76x = 220,715.20 × 79,666.83
  4. Step 4: Simplify right side
    147,280.76x = 17,583,679,918.48
  5. Step 5: Solve for x
    x = 17,583,679,918.48/147,280.76
  6. Step 6: Final answer
    x = 119,388.85

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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.