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Finding the Fourth Proportional to 158,417.89, 218,616.65 and 86,800.63

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Solution

The fourth proportional to 158,417.89, 218,616.65 and 86,800.63 is: 119,784.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,417.89 : 218,616.65 = 86,800.63 : x
  2. Step 2: Convert to fraction form
    158,417.89/218,616.65 = 86,800.63/x
  3. Step 3: Cross multiply
    158,417.89x = 218,616.65 × 86,800.63
  4. Step 4: Simplify right side
    158,417.89x = 18,976,062,514.49
  5. Step 5: Solve for x
    x = 18,976,062,514.49/158,417.89
  6. Step 6: Final answer
    x = 119,784.85

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1.5x scale

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.