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Finding the Fourth Proportional to 117,691.66, 162,420.42 and 72,372.16

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Solution

The fourth proportional to 117,691.66, 162,420.42 and 72,372.16 is: 99,877.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,691.66 : 162,420.42 = 72,372.16 : x
  2. Step 2: Convert to fraction form
    117,691.66/162,420.42 = 72,372.16/x
  3. Step 3: Cross multiply
    117,691.66x = 162,420.42 × 72,372.16
  4. Step 4: Simplify right side
    117,691.66x = 11,754,716,623.51
  5. Step 5: Solve for x
    x = 11,754,716,623.51/117,691.66
  6. Step 6: Final answer
    x = 99,877.23

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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.