Home / 121,026.20-181,539.30-87,589.40

Finding the Fourth Proportional to 121,026.20, 181,539.30 and 87,589.40

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Solution

The fourth proportional to 121,026.20, 181,539.30 and 87,589.40 is: 131,384.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,026.20 : 181,539.30 = 87,589.40 : x
  2. Step 2: Convert to fraction form
    121,026.20/181,539.30 = 87,589.40/x
  3. Step 3: Cross multiply
    121,026.20x = 181,539.30 × 87,589.40
  4. Step 4: Simplify right side
    121,026.20x = 15,900,918,363.42
  5. Step 5: Solve for x
    x = 15,900,918,363.42/121,026.20
  6. Step 6: Final answer
    x = 131,384.10

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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.