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Finding the Fourth Proportional to 121,381.76, 167,511.96 and 67,666.72

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Solution

The fourth proportional to 121,381.76, 167,511.96 and 67,666.72 is: 93,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,381.76 : 167,511.96 = 67,666.72 : x
  2. Step 2: Convert to fraction form
    121,381.76/167,511.96 = 67,666.72/x
  3. Step 3: Cross multiply
    121,381.76x = 167,511.96 × 67,666.72
  4. Step 4: Simplify right side
    121,381.76x = 11,334,984,893.97
  5. Step 5: Solve for x
    x = 11,334,984,893.97/121,381.76
  6. Step 6: Final answer
    x = 93,382.93

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1.5x scale

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.