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Finding the Fourth Proportional to 113,425.80, 170,138.70 and 79,600.20

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Solution

The fourth proportional to 113,425.80, 170,138.70 and 79,600.20 is: 119,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,425.80 : 170,138.70 = 79,600.20 : x
  2. Step 2: Convert to fraction form
    113,425.80/170,138.70 = 79,600.20/x
  3. Step 3: Cross multiply
    113,425.80x = 170,138.70 × 79,600.20
  4. Step 4: Simplify right side
    113,425.80x = 13,543,074,547.74
  5. Step 5: Solve for x
    x = 13,543,074,547.74/113,425.80
  6. Step 6: Final answer
    x = 119,400.30

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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.