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Finding the Fourth Proportional to 125,019.30, 172,531.02 and 68,430.72

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Solution

The fourth proportional to 125,019.30, 172,531.02 and 68,430.72 is: 94,436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,019.30 : 172,531.02 = 68,430.72 : x
  2. Step 2: Convert to fraction form
    125,019.30/172,531.02 = 68,430.72/x
  3. Step 3: Cross multiply
    125,019.30x = 172,531.02 × 68,430.72
  4. Step 4: Simplify right side
    125,019.30x = 11,806,421,920.93
  5. Step 5: Solve for x
    x = 11,806,421,920.93/125,019.30
  6. Step 6: Final answer
    x = 94,436.79

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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.