Home / 142,665.20-213,767.40-89,980.40

Finding the Fourth Proportional to 142,665.20, 213,767.40 and 89,980.40

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Solution

The fourth proportional to 142,665.20, 213,767.40 and 89,980.40 is: 134,825.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,665.20 : 213,767.40 = 89,980.40 : x
  2. Step 2: Convert to fraction form
    142,665.20/213,767.40 = 89,980.40/x
  3. Step 3: Cross multiply
    142,665.20x = 213,767.40 × 89,980.40
  4. Step 4: Simplify right side
    142,665.20x = 19,234,876,158.96
  5. Step 5: Solve for x
    x = 19,234,876,158.96/142,665.20
  6. Step 6: Final answer
    x = 134,825.28

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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.