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Finding the Fourth Proportional to 90,780.80, 136,017.60 and 43,932.80

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Solution

The fourth proportional to 90,780.80, 136,017.60 and 43,932.80 is: 65,824.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,780.80 : 136,017.60 = 43,932.80 : x
  2. Step 2: Convert to fraction form
    90,780.80/136,017.60 = 43,932.80/x
  3. Step 3: Cross multiply
    90,780.80x = 136,017.60 × 43,932.80
  4. Step 4: Simplify right side
    90,780.80x = 5,975,634,017.28
  5. Step 5: Solve for x
    x = 5,975,634,017.28/90,780.80
  6. Step 6: Final answer
    x = 65,824.87

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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.