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Finding the Fourth Proportional to 71,427.76, 98,568.80 and 39,596.40

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Solution

The fourth proportional to 71,427.76, 98,568.80 and 39,596.40 is: 54,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,427.76 : 98,568.80 = 39,596.40 : x
  2. Step 2: Convert to fraction form
    71,427.76/98,568.80 = 39,596.40/x
  3. Step 3: Cross multiply
    71,427.76x = 98,568.80 × 39,596.40
  4. Step 4: Simplify right side
    71,427.76x = 3,902,969,632.32
  5. Step 5: Solve for x
    x = 3,902,969,632.32/71,427.76
  6. Step 6: Final answer
    x = 54,642.20

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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.