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Finding the Fourth Proportional to 158,503.89, 218,734.34 and 86,886.93

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Solution

The fourth proportional to 158,503.89, 218,734.34 and 86,886.93 is: 119,903.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,503.89 : 218,734.34 = 86,886.93 : x
  2. Step 2: Convert to fraction form
    158,503.89/218,734.34 = 86,886.93/x
  3. Step 3: Cross multiply
    158,503.89x = 218,734.34 × 86,886.93
  4. Step 4: Simplify right side
    158,503.89x = 19,005,154,853.74
  5. Step 5: Solve for x
    x = 19,005,154,853.74/158,503.89
  6. Step 6: Final answer
    x = 119,903.40

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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.