Home / 121,845.90-168,146.19-68,130.30

Finding the Fourth Proportional to 121,845.90, 168,146.19 and 68,130.30

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Solution

The fourth proportional to 121,845.90, 168,146.19 and 68,130.30 is: 94,019.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,845.90 : 168,146.19 = 68,130.30 : x
  2. Step 2: Convert to fraction form
    121,845.90/168,146.19 = 68,130.30/x
  3. Step 3: Cross multiply
    121,845.90x = 168,146.19 × 68,130.30
  4. Step 4: Simplify right side
    121,845.90x = 11,455,850,368.56
  5. Step 5: Solve for x
    x = 11,455,850,368.56/121,845.90
  6. Step 6: Final answer
    x = 94,019.17

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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.