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Finding the Fourth Proportional to 154,860.58, 213,687.13 and 86,874.95

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Solution

The fourth proportional to 154,860.58, 213,687.13 and 86,874.95 is: 119,875.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,860.58 : 213,687.13 = 86,874.95 : x
  2. Step 2: Convert to fraction form
    154,860.58/213,687.13 = 86,874.95/x
  3. Step 3: Cross multiply
    154,860.58x = 213,687.13 × 86,874.95
  4. Step 4: Simplify right side
    154,860.58x = 18,564,058,734.39
  5. Step 5: Solve for x
    x = 18,564,058,734.39/154,860.58
  6. Step 6: Final answer
    x = 119,875.95

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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.