Home / 280,239.28-420,425.61-90,699.65

Finding the Fourth Proportional to 280,239.28, 420,425.61 and 90,699.65

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Solution

The fourth proportional to 280,239.28, 420,425.61 and 90,699.65 is: 136,071.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,239.28 : 420,425.61 = 90,699.65 : x
  2. Step 2: Convert to fraction form
    280,239.28/420,425.61 = 90,699.65/x
  3. Step 3: Cross multiply
    280,239.28x = 420,425.61 × 90,699.65
  4. Step 4: Simplify right side
    280,239.28x = 38,132,454,395.21
  5. Step 5: Solve for x
    x = 38,132,454,395.21/280,239.28
  6. Step 6: Final answer
    x = 136,071.06

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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.