Home / 121,159.20-181,933.20-81,890.40

Finding the Fourth Proportional to 121,159.20, 181,933.20 and 81,890.40

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Solution

The fourth proportional to 121,159.20, 181,933.20 and 81,890.40 is: 122,966.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,159.20 : 181,933.20 = 81,890.40 : x
  2. Step 2: Convert to fraction form
    121,159.20/181,933.20 = 81,890.40/x
  3. Step 3: Cross multiply
    121,159.20x = 181,933.20 × 81,890.40
  4. Step 4: Simplify right side
    121,159.20x = 14,898,582,521.28
  5. Step 5: Solve for x
    x = 14,898,582,521.28/121,159.20
  6. Step 6: Final answer
    x = 122,966.99

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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.