Home / 280,158.48-420,141.14-90,570.28

Finding the Fourth Proportional to 280,158.48, 420,141.14 and 90,570.28

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Solution

The fourth proportional to 280,158.48, 420,141.14 and 90,570.28 is: 135,824.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,158.48 : 420,141.14 = 90,570.28 : x
  2. Step 2: Convert to fraction form
    280,158.48/420,141.14 = 90,570.28/x
  3. Step 3: Cross multiply
    280,158.48x = 420,141.14 × 90,570.28
  4. Step 4: Simplify right side
    280,158.48x = 38,052,300,689.32
  5. Step 5: Solve for x
    x = 38,052,300,689.32/280,158.48
  6. Step 6: Final answer
    x = 135,824.20

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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.