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Finding the Fourth Proportional to 38,719.20, 58,078.80 and 29,960.40

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Solution

The fourth proportional to 38,719.20, 58,078.80 and 29,960.40 is: 44,940.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,719.20 : 58,078.80 = 29,960.40 : x
  2. Step 2: Convert to fraction form
    38,719.20/58,078.80 = 29,960.40/x
  3. Step 3: Cross multiply
    38,719.20x = 58,078.80 × 29,960.40
  4. Step 4: Simplify right side
    38,719.20x = 1,740,064,079.52
  5. Step 5: Solve for x
    x = 1,740,064,079.52/38,719.20
  6. Step 6: Final answer
    x = 44,940.60

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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.