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Finding the Fourth Proportional to 124,917.13, 172,389.72 and 68,328.46

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Solution

The fourth proportional to 124,917.13, 172,389.72 and 68,328.46 is: 94,295.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,917.13 : 172,389.72 = 68,328.46 : x
  2. Step 2: Convert to fraction form
    124,917.13/172,389.72 = 68,328.46/x
  3. Step 3: Cross multiply
    124,917.13x = 172,389.72 × 68,328.46
  4. Step 4: Simplify right side
    124,917.13x = 11,779,124,087.43
  5. Step 5: Solve for x
    x = 11,779,124,087.43/124,917.13
  6. Step 6: Final answer
    x = 94,295.51

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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.