Home / 113,428.20-170,142.30-71,437.80

Finding the Fourth Proportional to 113,428.20, 170,142.30 and 71,437.80

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Solution

The fourth proportional to 113,428.20, 170,142.30 and 71,437.80 is: 107,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,428.20 : 170,142.30 = 71,437.80 : x
  2. Step 2: Convert to fraction form
    113,428.20/170,142.30 = 71,437.80/x
  3. Step 3: Cross multiply
    113,428.20x = 170,142.30 × 71,437.80
  4. Step 4: Simplify right side
    113,428.20x = 12,154,591,598.94
  5. Step 5: Solve for x
    x = 12,154,591,598.94/113,428.20
  6. Step 6: Final answer
    x = 107,156.70

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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.