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Finding the Fourth Proportional to 124,902.61, 172,369.72 and 68,313.98

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Solution

The fourth proportional to 124,902.61, 172,369.72 and 68,313.98 is: 94,275.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,902.61 : 172,369.72 = 68,313.98 : x
  2. Step 2: Convert to fraction form
    124,902.61/172,369.72 = 68,313.98/x
  3. Step 3: Cross multiply
    124,902.61x = 172,369.72 × 68,313.98
  4. Step 4: Simplify right side
    124,902.61x = 11,775,262,121.00
  5. Step 5: Solve for x
    x = 11,775,262,121.00/124,902.61
  6. Step 6: Final answer
    x = 94,275.55

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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.