Home / 117,129.60-161,636.90-63,414.18

Finding the Fourth Proportional to 117,129.60, 161,636.90 and 63,414.18

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Solution

The fourth proportional to 117,129.60, 161,636.90 and 63,414.18 is: 87,510.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.60 : 161,636.90 = 63,414.18 : x
  2. Step 2: Convert to fraction form
    117,129.60/161,636.90 = 63,414.18/x
  3. Step 3: Cross multiply
    117,129.60x = 161,636.90 × 63,414.18
  4. Step 4: Simplify right side
    117,129.60x = 10,250,071,154.17
  5. Step 5: Solve for x
    x = 10,250,071,154.17/117,129.60
  6. Step 6: Final answer
    x = 87,510.51

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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.