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Finding the Fourth Proportional to 121,586.40, 167,788.89 and 67,870.98

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Solution

The fourth proportional to 121,586.40, 167,788.89 and 67,870.98 is: 93,661.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,586.40 : 167,788.89 = 67,870.98 : x
  2. Step 2: Convert to fraction form
    121,586.40/167,788.89 = 67,870.98/x
  3. Step 3: Cross multiply
    121,586.40x = 167,788.89 × 67,870.98
  4. Step 4: Simplify right side
    121,586.40x = 11,387,996,397.41
  5. Step 5: Solve for x
    x = 11,387,996,397.41/121,586.40
  6. Step 6: Final answer
    x = 93,661.76

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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.