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Finding the Fourth Proportional to 54,751.70, 81,731.53 and 48,108.70

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Solution

The fourth proportional to 54,751.70, 81,731.53 and 48,108.70 is: 71,815.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,751.70 : 81,731.53 = 48,108.70 : x
  2. Step 2: Convert to fraction form
    54,751.70/81,731.53 = 48,108.70/x
  3. Step 3: Cross multiply
    54,751.70x = 81,731.53 × 48,108.70
  4. Step 4: Simplify right side
    54,751.70x = 3,931,997,657.31
  5. Step 5: Solve for x
    x = 3,931,997,657.31/54,751.70
  6. Step 6: Final answer
    x = 71,815.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.