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Finding the Fourth Proportional to 117,395.18, 161,825.59 and 71,988.96

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Solution

The fourth proportional to 117,395.18, 161,825.59 and 71,988.96 is: 99,234.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,395.18 : 161,825.59 = 71,988.96 : x
  2. Step 2: Convert to fraction form
    117,395.18/161,825.59 = 71,988.96/x
  3. Step 3: Cross multiply
    117,395.18x = 161,825.59 × 71,988.96
  4. Step 4: Simplify right side
    117,395.18x = 11,649,655,925.49
  5. Step 5: Solve for x
    x = 11,649,655,925.49/117,395.18
  6. Step 6: Final answer
    x = 99,234.53

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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.