Home / 82,279.40-123,419.10-72,602.60

Finding the Fourth Proportional to 82,279.40, 123,419.10 and 72,602.60

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Solution

The fourth proportional to 82,279.40, 123,419.10 and 72,602.60 is: 108,903.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,279.40 : 123,419.10 = 72,602.60 : x
  2. Step 2: Convert to fraction form
    82,279.40/123,419.10 = 72,602.60/x
  3. Step 3: Cross multiply
    82,279.40x = 123,419.10 × 72,602.60
  4. Step 4: Simplify right side
    82,279.40x = 8,960,547,549.66
  5. Step 5: Solve for x
    x = 8,960,547,549.66/82,279.40
  6. Step 6: Final answer
    x = 108,903.90

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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.