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Finding the Fourth Proportional to 71,391.81, 98,521.35 and 39,561.39

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Solution

The fourth proportional to 71,391.81, 98,521.35 and 39,561.39 is: 54,595.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.81 : 98,521.35 = 39,561.39 : x
  2. Step 2: Convert to fraction form
    71,391.81/98,521.35 = 39,561.39/x
  3. Step 3: Cross multiply
    71,391.81x = 98,521.35 × 39,561.39
  4. Step 4: Simplify right side
    71,391.81x = 3,897,641,550.68
  5. Step 5: Solve for x
    x = 3,897,641,550.68/71,391.81
  6. Step 6: Final answer
    x = 54,595.08

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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.