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Finding the Fourth Proportional to 90,729.60, 135,932.40 and 43,879.20

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Solution

The fourth proportional to 90,729.60, 135,932.40 and 43,879.20 is: 65,740.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,729.60 : 135,932.40 = 43,879.20 : x
  2. Step 2: Convert to fraction form
    90,729.60/135,932.40 = 43,879.20/x
  3. Step 3: Cross multiply
    90,729.60x = 135,932.40 × 43,879.20
  4. Step 4: Simplify right side
    90,729.60x = 5,964,604,966.08
  5. Step 5: Solve for x
    x = 5,964,604,966.08/90,729.60
  6. Step 6: Final answer
    x = 65,740.45

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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.