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Finding the Fourth Proportional to 90,859.68, 125,346.96 and 63,997.92

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Solution

The fourth proportional to 90,859.68, 125,346.96 and 63,997.92 is: 88,289.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,859.68 : 125,346.96 = 63,997.92 : x
  2. Step 2: Convert to fraction form
    90,859.68/125,346.96 = 63,997.92/x
  3. Step 3: Cross multiply
    90,859.68x = 125,346.96 × 63,997.92
  4. Step 4: Simplify right side
    90,859.68x = 8,021,944,718.32
  5. Step 5: Solve for x
    x = 8,021,944,718.32/90,859.68
  6. Step 6: Final answer
    x = 88,289.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.