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Finding the Fourth Proportional to 72,254.40, 108,323.28 and 66,422.40

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Solution

The fourth proportional to 72,254.40, 108,323.28 and 66,422.40 is: 99,579.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,254.40 : 108,323.28 = 66,422.40 : x
  2. Step 2: Convert to fraction form
    72,254.40/108,323.28 = 66,422.40/x
  3. Step 3: Cross multiply
    72,254.40x = 108,323.28 × 66,422.40
  4. Step 4: Simplify right side
    72,254.40x = 7,195,092,233.47
  5. Step 5: Solve for x
    x = 7,195,092,233.47/72,254.40
  6. Step 6: Final answer
    x = 99,579.99

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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.