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Finding the Fourth Proportional to 128,041.70, 192,062.55 and 88,643.30

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Solution

The fourth proportional to 128,041.70, 192,062.55 and 88,643.30 is: 132,964.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,041.70 : 192,062.55 = 88,643.30 : x
  2. Step 2: Convert to fraction form
    128,041.70/192,062.55 = 88,643.30/x
  3. Step 3: Cross multiply
    128,041.70x = 192,062.55 × 88,643.30
  4. Step 4: Simplify right side
    128,041.70x = 17,025,058,238.42
  5. Step 5: Solve for x
    x = 17,025,058,238.42/128,041.70
  6. Step 6: Final answer
    x = 132,964.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.