Home / 138,823.74-191,565.18-81,457.20

Finding the Fourth Proportional to 138,823.74, 191,565.18 and 81,457.20

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Solution

The fourth proportional to 138,823.74, 191,565.18 and 81,457.20 is: 112,404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,823.74 : 191,565.18 = 81,457.20 : x
  2. Step 2: Convert to fraction form
    138,823.74/191,565.18 = 81,457.20/x
  3. Step 3: Cross multiply
    138,823.74x = 191,565.18 × 81,457.20
  4. Step 4: Simplify right side
    138,823.74x = 15,604,363,180.30
  5. Step 5: Solve for x
    x = 15,604,363,180.30/138,823.74
  6. Step 6: Final answer
    x = 112,404.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.