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Finding the Fourth Proportional to 158,417.14, 218,615.61 and 86,799.88

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Solution

The fourth proportional to 158,417.14, 218,615.61 and 86,799.88 is: 119,783.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,417.14 : 218,615.61 = 86,799.88 : x
  2. Step 2: Convert to fraction form
    158,417.14/218,615.61 = 86,799.88/x
  3. Step 3: Cross multiply
    158,417.14x = 218,615.61 × 86,799.88
  4. Step 4: Simplify right side
    158,417.14x = 18,975,808,714.13
  5. Step 5: Solve for x
    x = 18,975,808,714.13/158,417.14
  6. Step 6: Final answer
    x = 119,783.81

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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.