Home / 82,002.10-123,003.15-74,128.90

Finding the Fourth Proportional to 82,002.10, 123,003.15 and 74,128.90

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Solution

The fourth proportional to 82,002.10, 123,003.15 and 74,128.90 is: 111,193.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,002.10 : 123,003.15 = 74,128.90 : x
  2. Step 2: Convert to fraction form
    82,002.10/123,003.15 = 74,128.90/x
  3. Step 3: Cross multiply
    82,002.10x = 123,003.15 × 74,128.90
  4. Step 4: Simplify right side
    82,002.10x = 9,118,088,206.04
  5. Step 5: Solve for x
    x = 9,118,088,206.04/82,002.10
  6. Step 6: Final answer
    x = 111,193.35

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1.5x scale

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.