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Finding the Fourth Proportional to 157,908.60, 217,904.58 and 86,274.36

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Solution

The fourth proportional to 157,908.60, 217,904.58 and 86,274.36 is: 119,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,908.60 : 217,904.58 = 86,274.36 : x
  2. Step 2: Convert to fraction form
    157,908.60/217,904.58 = 86,274.36/x
  3. Step 3: Cross multiply
    157,908.60x = 217,904.58 × 86,274.36
  4. Step 4: Simplify right side
    157,908.60x = 18,799,578,180.57
  5. Step 5: Solve for x
    x = 18,799,578,180.57/157,908.60
  6. Step 6: Final answer
    x = 119,053.54

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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.