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Finding the Fourth Proportional to 121,470.90, 167,707.89 and 76,210.98

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Solution

The fourth proportional to 121,470.90, 167,707.89 and 76,210.98 is: 105,220.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,470.90 : 167,707.89 = 76,210.98 : x
  2. Step 2: Convert to fraction form
    121,470.90/167,707.89 = 76,210.98/x
  3. Step 3: Cross multiply
    121,470.90x = 167,707.89 × 76,210.98
  4. Step 4: Simplify right side
    121,470.90x = 12,781,182,650.63
  5. Step 5: Solve for x
    x = 12,781,182,650.63/121,470.90
  6. Step 6: Final answer
    x = 105,220.12

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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.