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Finding the Fourth Proportional to 54,988.88, 75,884.72 and 31,115.07

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Solution

The fourth proportional to 54,988.88, 75,884.72 and 31,115.07 is: 42,938.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,988.88 : 75,884.72 = 31,115.07 : x
  2. Step 2: Convert to fraction form
    54,988.88/75,884.72 = 31,115.07/x
  3. Step 3: Cross multiply
    54,988.88x = 75,884.72 × 31,115.07
  4. Step 4: Simplify right side
    54,988.88x = 2,361,158,219.16
  5. Step 5: Solve for x
    x = 2,361,158,219.16/54,988.88
  6. Step 6: Final answer
    x = 42,938.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.