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Finding the Fourth Proportional to 71,707.36, 98,948.58 and 39,871.12

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Solution

The fourth proportional to 71,707.36, 98,948.58 and 39,871.12 is: 55,017.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,707.36 : 98,948.58 = 39,871.12 : x
  2. Step 2: Convert to fraction form
    71,707.36/98,948.58 = 39,871.12/x
  3. Step 3: Cross multiply
    71,707.36x = 98,948.58 × 39,871.12
  4. Step 4: Simplify right side
    71,707.36x = 3,945,190,707.01
  5. Step 5: Solve for x
    x = 3,945,190,707.01/71,707.36
  6. Step 6: Final answer
    x = 55,017.93

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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.