Home / 121,854.24-168,174.52-68,142.28

Finding the Fourth Proportional to 121,854.24, 168,174.52 and 68,142.28

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Solution

The fourth proportional to 121,854.24, 168,174.52 and 68,142.28 is: 94,045.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,854.24 : 168,174.52 = 68,142.28 : x
  2. Step 2: Convert to fraction form
    121,854.24/168,174.52 = 68,142.28/x
  3. Step 3: Cross multiply
    121,854.24x = 168,174.52 × 68,142.28
  4. Step 4: Simplify right side
    121,854.24x = 11,459,795,230.71
  5. Step 5: Solve for x
    x = 11,459,795,230.71/121,854.24
  6. Step 6: Final answer
    x = 94,045.11

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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.