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Finding the Fourth Proportional to 54,803.71, 75,630.31 and 30,930.55

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Solution

The fourth proportional to 54,803.71, 75,630.31 and 30,930.55 is: 42,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,803.71 : 75,630.31 = 30,930.55 : x
  2. Step 2: Convert to fraction form
    54,803.71/75,630.31 = 30,930.55/x
  3. Step 3: Cross multiply
    54,803.71x = 75,630.31 × 30,930.55
  4. Step 4: Simplify right side
    54,803.71x = 2,339,287,417.97
  5. Step 5: Solve for x
    x = 2,339,287,417.97/54,803.71
  6. Step 6: Final answer
    x = 42,684.84

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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.