Home / 90,780.60-135,902.10-67,510.20

Finding the Fourth Proportional to 90,780.60, 135,902.10 and 67,510.20

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Solution

The fourth proportional to 90,780.60, 135,902.10 and 67,510.20 is: 101,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,780.60 : 135,902.10 = 67,510.20 : x
  2. Step 2: Convert to fraction form
    90,780.60/135,902.10 = 67,510.20/x
  3. Step 3: Cross multiply
    90,780.60x = 135,902.10 × 67,510.20
  4. Step 4: Simplify right side
    90,780.60x = 9,174,777,951.42
  5. Step 5: Solve for x
    x = 9,174,777,951.42/90,780.60
  6. Step 6: Final answer
    x = 101,065.40

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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.