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Finding the Fourth Proportional to 90,768.80, 136,007.40 and 75,897.20

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Solution

The fourth proportional to 90,768.80, 136,007.40 and 75,897.20 is: 113,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,768.80 : 136,007.40 = 75,897.20 : x
  2. Step 2: Convert to fraction form
    90,768.80/136,007.40 = 75,897.20/x
  3. Step 3: Cross multiply
    90,768.80x = 136,007.40 × 75,897.20
  4. Step 4: Simplify right side
    90,768.80x = 10,322,580,839.28
  5. Step 5: Solve for x
    x = 10,322,580,839.28/90,768.80
  6. Step 6: Final answer
    x = 113,723.89

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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.