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Finding the Fourth Proportional to 158,503.39, 218,733.64 and 86,886.43

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Solution

The fourth proportional to 158,503.39, 218,733.64 and 86,886.43 is: 119,902.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,503.39 : 218,733.64 = 86,886.43 : x
  2. Step 2: Convert to fraction form
    158,503.39/218,733.64 = 86,886.43/x
  3. Step 3: Cross multiply
    158,503.39x = 218,733.64 × 86,886.43
  4. Step 4: Simplify right side
    158,503.39x = 19,004,985,100.51
  5. Step 5: Solve for x
    x = 19,004,985,100.51/158,503.39
  6. Step 6: Final answer
    x = 119,902.70

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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.