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Finding the Fourth Proportional to 70,046.28, 105,058.14 and 20,115.02

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Solution

The fourth proportional to 70,046.28, 105,058.14 and 20,115.02 is: 30,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,046.28 : 105,058.14 = 20,115.02 : x
  2. Step 2: Convert to fraction form
    70,046.28/105,058.14 = 20,115.02/x
  3. Step 3: Cross multiply
    70,046.28x = 105,058.14 × 20,115.02
  4. Step 4: Simplify right side
    70,046.28x = 2,113,246,587.26
  5. Step 5: Solve for x
    x = 2,113,246,587.26/70,046.28
  6. Step 6: Final answer
    x = 30,169.29

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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.