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Finding the Fourth Proportional to 121,358.86, 167,471.35 and 76,061.30

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Solution

The fourth proportional to 121,358.86, 167,471.35 and 76,061.30 is: 104,962.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,358.86 : 167,471.35 = 76,061.30 : x
  2. Step 2: Convert to fraction form
    121,358.86/167,471.35 = 76,061.30/x
  3. Step 3: Cross multiply
    121,358.86x = 167,471.35 × 76,061.30
  4. Step 4: Simplify right side
    121,358.86x = 12,738,087,566.25
  5. Step 5: Solve for x
    x = 12,738,087,566.25/121,358.86
  6. Step 6: Final answer
    x = 104,962.16

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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.