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Finding the Fourth Proportional to 71,179.36, 98,220 and 39,343.12

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Solution

The fourth proportional to 71,179.36, 98,220 and 39,343.12 is: 54,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,179.36 : 98,220 = 39,343.12 : x
  2. Step 2: Convert to fraction form
    71,179.36/98,220 = 39,343.12/x
  3. Step 3: Cross multiply
    71,179.36x = 98,220 × 39,343.12
  4. Step 4: Simplify right side
    71,179.36x = 3,864,281,246.40
  5. Step 5: Solve for x
    x = 3,864,281,246.40/71,179.36
  6. Step 6: Final answer
    x = 54,289.35

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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.