Home / 121,764.90-167,926.76-76,447.11

Finding the Fourth Proportional to 121,764.90, 167,926.76 and 76,447.11

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Solution

The fourth proportional to 121,764.90, 167,926.76 and 76,447.11 is: 105,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,764.90 : 167,926.76 = 76,447.11 : x
  2. Step 2: Convert to fraction form
    121,764.90/167,926.76 = 76,447.11/x
  3. Step 3: Cross multiply
    121,764.90x = 167,926.76 × 76,447.11
  4. Step 4: Simplify right side
    121,764.90x = 12,837,515,111.43
  5. Step 5: Solve for x
    x = 12,837,515,111.43/121,764.90
  6. Step 6: Final answer
    x = 105,428.70

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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.