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Finding the Fourth Proportional to 104,881.75, 157,345.40 and 38,321.78

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Solution

The fourth proportional to 104,881.75, 157,345.40 and 38,321.78 is: 57,490.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,881.75 : 157,345.40 = 38,321.78 : x
  2. Step 2: Convert to fraction form
    104,881.75/157,345.40 = 38,321.78/x
  3. Step 3: Cross multiply
    104,881.75x = 157,345.40 × 38,321.78
  4. Step 4: Simplify right side
    104,881.75x = 6,029,755,111.89
  5. Step 5: Solve for x
    x = 6,029,755,111.89/104,881.75
  6. Step 6: Final answer
    x = 57,490.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.