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Finding the Fourth Proportional to 90,451.68, 124,830.90 and 52,728.36

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Solution

The fourth proportional to 90,451.68, 124,830.90 and 52,728.36 is: 72,769.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,451.68 : 124,830.90 = 52,728.36 : x
  2. Step 2: Convert to fraction form
    90,451.68/124,830.90 = 52,728.36/x
  3. Step 3: Cross multiply
    90,451.68x = 124,830.90 × 52,728.36
  4. Step 4: Simplify right side
    90,451.68x = 6,582,128,634.32
  5. Step 5: Solve for x
    x = 6,582,128,634.32/90,451.68
  6. Step 6: Final answer
    x = 72,769.56

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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.