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Finding the Fourth Proportional to 121,487.61, 167,755.95 and 76,241.01

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Solution

The fourth proportional to 121,487.61, 167,755.95 and 76,241.01 is: 105,277.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,487.61 : 167,755.95 = 76,241.01 : x
  2. Step 2: Convert to fraction form
    121,487.61/167,755.95 = 76,241.01/x
  3. Step 3: Cross multiply
    121,487.61x = 167,755.95 × 76,241.01
  4. Step 4: Simplify right side
    121,487.61x = 12,789,883,061.51
  5. Step 5: Solve for x
    x = 12,789,883,061.51/121,487.61
  6. Step 6: Final answer
    x = 105,277.26

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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.