Home / 117,143.10-161,657.55-63,428.15

Finding the Fourth Proportional to 117,143.10, 161,657.55 and 63,428.15

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Solution

The fourth proportional to 117,143.10, 161,657.55 and 63,428.15 is: 87,530.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,143.10 : 161,657.55 = 63,428.15 : x
  2. Step 2: Convert to fraction form
    117,143.10/161,657.55 = 63,428.15/x
  3. Step 3: Cross multiply
    117,143.10x = 161,657.55 × 63,428.15
  4. Step 4: Simplify right side
    117,143.10x = 10,253,639,734.18
  5. Step 5: Solve for x
    x = 10,253,639,734.18/117,143.10
  6. Step 6: Final answer
    x = 87,530.89

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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.