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Finding the Fourth Proportional to 70,977.71, 106,466.55 and 18,387.20

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Solution

The fourth proportional to 70,977.71, 106,466.55 and 18,387.20 is: 27,580.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,977.71 : 106,466.55 = 18,387.20 : x
  2. Step 2: Convert to fraction form
    70,977.71/106,466.55 = 18,387.20/x
  3. Step 3: Cross multiply
    70,977.71x = 106,466.55 × 18,387.20
  4. Step 4: Simplify right side
    70,977.71x = 1,957,621,215.83
  5. Step 5: Solve for x
    x = 1,957,621,215.83/70,977.71
  6. Step 6: Final answer
    x = 27,580.79

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Similar ratio
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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.