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Finding the Fourth Proportional to 154,559.90, 213,300.68 and 86,572.90

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Solution

The fourth proportional to 154,559.90, 213,300.68 and 86,572.90 is: 119,475.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,559.90 : 213,300.68 = 86,572.90 : x
  2. Step 2: Convert to fraction form
    154,559.90/213,300.68 = 86,572.90/x
  3. Step 3: Cross multiply
    154,559.90x = 213,300.68 × 86,572.90
  4. Step 4: Simplify right side
    154,559.90x = 18,466,058,439.57
  5. Step 5: Solve for x
    x = 18,466,058,439.57/154,559.90
  6. Step 6: Final answer
    x = 119,475.09

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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.