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Finding the Fourth Proportional to 124,980.16, 172,472 and 68,391.04

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Solution

The fourth proportional to 124,980.16, 172,472 and 68,391.04 is: 94,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,980.16 : 172,472 = 68,391.04 : x
  2. Step 2: Convert to fraction form
    124,980.16/172,472 = 68,391.04/x
  3. Step 3: Cross multiply
    124,980.16x = 172,472 × 68,391.04
  4. Step 4: Simplify right side
    124,980.16x = 11,795,539,450.88
  5. Step 5: Solve for x
    x = 11,795,539,450.88/124,980.16
  6. Step 6: Final answer
    x = 94,379.30

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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.