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Finding the Fourth Proportional to 71,319.57, 98,420.72 and 39,054.33

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Solution

The fourth proportional to 71,319.57, 98,420.72 and 39,054.33 is: 53,894.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,319.57 : 98,420.72 = 39,054.33 : x
  2. Step 2: Convert to fraction form
    71,319.57/98,420.72 = 39,054.33/x
  3. Step 3: Cross multiply
    71,319.57x = 98,420.72 × 39,054.33
  4. Step 4: Simplify right side
    71,319.57x = 3,843,755,082.45
  5. Step 5: Solve for x
    x = 3,843,755,082.45/71,319.57
  6. Step 6: Final answer
    x = 53,894.82

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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.