Home / 90,909.30-136,178.06-74,102.21

Finding the Fourth Proportional to 90,909.30, 136,178.06 and 74,102.21

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Solution

The fourth proportional to 90,909.30, 136,178.06 and 74,102.21 is: 111,001.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,909.30 : 136,178.06 = 74,102.21 : x
  2. Step 2: Convert to fraction form
    90,909.30/136,178.06 = 74,102.21/x
  3. Step 3: Cross multiply
    90,909.30x = 136,178.06 × 74,102.21
  4. Step 4: Simplify right side
    90,909.30x = 10,091,094,658.78
  5. Step 5: Solve for x
    x = 10,091,094,658.78/90,909.30
  6. Step 6: Final answer
    x = 111,001.78

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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.