Home / 280,243.65-420,432.18-90,704.04

Finding the Fourth Proportional to 280,243.65, 420,432.18 and 90,704.04

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Solution

The fourth proportional to 280,243.65, 420,432.18 and 90,704.04 is: 136,077.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,243.65 : 420,432.18 = 90,704.04 : x
  2. Step 2: Convert to fraction form
    280,243.65/420,432.18 = 90,704.04/x
  3. Step 3: Cross multiply
    280,243.65x = 420,432.18 × 90,704.04
  4. Step 4: Simplify right side
    280,243.65x = 38,134,897,272.01
  5. Step 5: Solve for x
    x = 38,134,897,272.01/280,243.65
  6. Step 6: Final answer
    x = 136,077.65

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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.