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Finding the Fourth Proportional to 83,572.72, 125,359.34 and 21,243.22

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Solution

The fourth proportional to 83,572.72, 125,359.34 and 21,243.22 is: 31,864.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,572.72 : 125,359.34 = 21,243.22 : x
  2. Step 2: Convert to fraction form
    83,572.72/125,359.34 = 21,243.22/x
  3. Step 3: Cross multiply
    83,572.72x = 125,359.34 × 21,243.22
  4. Step 4: Simplify right side
    83,572.72x = 2,663,035,619.06
  5. Step 5: Solve for x
    x = 2,663,035,619.06/83,572.72
  6. Step 6: Final answer
    x = 31,864.89

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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.