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Finding the Fourth Proportional to 90,657.88, 124,664.22 and 78,700.30

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Solution

The fourth proportional to 90,657.88, 124,664.22 and 78,700.30 is: 108,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,657.88 : 124,664.22 = 78,700.30 : x
  2. Step 2: Convert to fraction form
    90,657.88/124,664.22 = 78,700.30/x
  3. Step 3: Cross multiply
    90,657.88x = 124,664.22 × 78,700.30
  4. Step 4: Simplify right side
    90,657.88x = 9,811,111,513.27
  5. Step 5: Solve for x
    x = 9,811,111,513.27/90,657.88
  6. Step 6: Final answer
    x = 108,221.28

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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.