Home / 145,499.10-218,248.65-120,129.90

Finding the Fourth Proportional to 145,499.10, 218,248.65 and 120,129.90

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Solution

The fourth proportional to 145,499.10, 218,248.65 and 120,129.90 is: 180,194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,499.10 : 218,248.65 = 120,129.90 : x
  2. Step 2: Convert to fraction form
    145,499.10/218,248.65 = 120,129.90/x
  3. Step 3: Cross multiply
    145,499.10x = 218,248.65 × 120,129.90
  4. Step 4: Simplify right side
    145,499.10x = 26,218,188,499.64
  5. Step 5: Solve for x
    x = 26,218,188,499.64/145,499.10
  6. Step 6: Final answer
    x = 180,194.85

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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.