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Finding the Fourth Proportional to 121,476.87, 167,528.94 and 76,159.80

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Solution

The fourth proportional to 121,476.87, 167,528.94 and 76,159.80 is: 105,032.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,476.87 : 167,528.94 = 76,159.80 : x
  2. Step 2: Convert to fraction form
    121,476.87/167,528.94 = 76,159.80/x
  3. Step 3: Cross multiply
    121,476.87x = 167,528.94 × 76,159.80
  4. Step 4: Simplify right side
    121,476.87x = 12,758,970,564.61
  5. Step 5: Solve for x
    x = 12,758,970,564.61/121,476.87
  6. Step 6: Final answer
    x = 105,032.10

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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.