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Finding the Fourth Proportional to 128,442.72, 192,664.36 and 69,306.24

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Solution

The fourth proportional to 128,442.72, 192,664.36 and 69,306.24 is: 103,959.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,442.72 : 192,664.36 = 69,306.24 : x
  2. Step 2: Convert to fraction form
    128,442.72/192,664.36 = 69,306.24/x
  3. Step 3: Cross multiply
    128,442.72x = 192,664.36 × 69,306.24
  4. Step 4: Simplify right side
    128,442.72x = 13,352,842,373.61
  5. Step 5: Solve for x
    x = 13,352,842,373.61/128,442.72
  6. Step 6: Final answer
    x = 103,959.51

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1.5x scale

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.