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Finding the Fourth Proportional to 125,348, 172,980.24 and 68,759.51

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Solution

The fourth proportional to 125,348, 172,980.24 and 68,759.51 is: 94,888.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,348 : 172,980.24 = 68,759.51 : x
  2. Step 2: Convert to fraction form
    125,348/172,980.24 = 68,759.51/x
  3. Step 3: Cross multiply
    125,348x = 172,980.24 × 68,759.51
  4. Step 4: Simplify right side
    125,348x = 11,894,036,542.08
  5. Step 5: Solve for x
    x = 11,894,036,542.08/125,348
  6. Step 6: Final answer
    x = 94,888.12

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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.