Home / 81,402.04-122,116.92-28,079.56

Finding the Fourth Proportional to 81,402.04, 122,116.92 and 28,079.56

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Solution

The fourth proportional to 81,402.04, 122,116.92 and 28,079.56 is: 42,124.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,402.04 : 122,116.92 = 28,079.56 : x
  2. Step 2: Convert to fraction form
    81,402.04/122,116.92 = 28,079.56/x
  3. Step 3: Cross multiply
    81,402.04x = 122,116.92 × 28,079.56
  4. Step 4: Simplify right side
    81,402.04x = 3,428,989,429.50
  5. Step 5: Solve for x
    x = 3,428,989,429.50/81,402.04
  6. Step 6: Final answer
    x = 42,124.12

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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.