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Finding the Fourth Proportional to 157,994.88, 218,031.57 and 86,374.68

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Solution

The fourth proportional to 157,994.88, 218,031.57 and 86,374.68 is: 119,196.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,994.88 : 218,031.57 = 86,374.68 : x
  2. Step 2: Convert to fraction form
    157,994.88/218,031.57 = 86,374.68/x
  3. Step 3: Cross multiply
    157,994.88x = 218,031.57 × 86,374.68
  4. Step 4: Simplify right side
    157,994.88x = 18,832,407,088.65
  5. Step 5: Solve for x
    x = 18,832,407,088.65/157,994.88
  6. Step 6: Final answer
    x = 119,196.31

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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.