Home / 121,911.16-168,232.14-76,635.64

Finding the Fourth Proportional to 121,911.16, 168,232.14 and 76,635.64

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Solution

The fourth proportional to 121,911.16, 168,232.14 and 76,635.64 is: 105,753.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,911.16 : 168,232.14 = 76,635.64 : x
  2. Step 2: Convert to fraction form
    121,911.16/168,232.14 = 76,635.64/x
  3. Step 3: Cross multiply
    121,911.16x = 168,232.14 × 76,635.64
  4. Step 4: Simplify right side
    121,911.16x = 12,892,577,717.47
  5. Step 5: Solve for x
    x = 12,892,577,717.47/121,911.16
  6. Step 6: Final answer
    x = 105,753.88

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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.