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Finding the Fourth Proportional to 71,503.12, 98,674.04 and 39,238.28

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Solution

The fourth proportional to 71,503.12, 98,674.04 and 39,238.28 is: 54,148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,503.12 : 98,674.04 = 39,238.28 : x
  2. Step 2: Convert to fraction form
    71,503.12/98,674.04 = 39,238.28/x
  3. Step 3: Cross multiply
    71,503.12x = 98,674.04 × 39,238.28
  4. Step 4: Simplify right side
    71,503.12x = 3,871,799,414.06
  5. Step 5: Solve for x
    x = 3,871,799,414.06/71,503.12
  6. Step 6: Final answer
    x = 54,148.68

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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.