Home / 145,041.12-217,359.20-78,337.52

Finding the Fourth Proportional to 145,041.12, 217,359.20 and 78,337.52

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Solution

The fourth proportional to 145,041.12, 217,359.20 and 78,337.52 is: 117,396.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,041.12 : 217,359.20 = 78,337.52 : x
  2. Step 2: Convert to fraction form
    145,041.12/217,359.20 = 78,337.52/x
  3. Step 3: Cross multiply
    145,041.12x = 217,359.20 × 78,337.52
  4. Step 4: Simplify right side
    145,041.12x = 17,027,380,677.18
  5. Step 5: Solve for x
    x = 17,027,380,677.18/145,041.12
  6. Step 6: Final answer
    x = 117,396.92

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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.