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Finding the Fourth Proportional to 83,047.40, 124,571.10 and 72,679.40

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Solution

The fourth proportional to 83,047.40, 124,571.10 and 72,679.40 is: 109,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,047.40 : 124,571.10 = 72,679.40 : x
  2. Step 2: Convert to fraction form
    83,047.40/124,571.10 = 72,679.40/x
  3. Step 3: Cross multiply
    83,047.40x = 124,571.10 × 72,679.40
  4. Step 4: Simplify right side
    83,047.40x = 9,053,752,805.34
  5. Step 5: Solve for x
    x = 9,053,752,805.34/83,047.40
  6. Step 6: Final answer
    x = 109,019.10

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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.