Home / 409,821.12-614,753.55-129,316.50

Finding the Fourth Proportional to 409,821.12, 614,753.55 and 129,316.50

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Solution

The fourth proportional to 409,821.12, 614,753.55 and 129,316.50 is: 193,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,821.12 : 614,753.55 = 129,316.50 : x
  2. Step 2: Convert to fraction form
    409,821.12/614,753.55 = 129,316.50/x
  3. Step 3: Cross multiply
    409,821.12x = 614,753.55 × 129,316.50
  4. Step 4: Simplify right side
    409,821.12x = 79,497,777,448.58
  5. Step 5: Solve for x
    x = 79,497,777,448.58/409,821.12
  6. Step 6: Final answer
    x = 193,981.65

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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.