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Finding the Fourth Proportional to 54,312.70, 81,449.07 and 18,764.91

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Solution

The fourth proportional to 54,312.70, 81,449.07 and 18,764.91 is: 28,140.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,312.70 : 81,449.07 = 18,764.91 : x
  2. Step 2: Convert to fraction form
    54,312.70/81,449.07 = 18,764.91/x
  3. Step 3: Cross multiply
    54,312.70x = 81,449.07 × 18,764.91
  4. Step 4: Simplify right side
    54,312.70x = 1,528,384,468.13
  5. Step 5: Solve for x
    x = 1,528,384,468.13/54,312.70
  6. Step 6: Final answer
    x = 28,140.46

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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.