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Finding the Fourth Proportional to 71,210.34, 98,265.42 and 39,378.96

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Solution

The fourth proportional to 71,210.34, 98,265.42 and 39,378.96 is: 54,340.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,210.34 : 98,265.42 = 39,378.96 : x
  2. Step 2: Convert to fraction form
    71,210.34/98,265.42 = 39,378.96/x
  3. Step 3: Cross multiply
    71,210.34x = 98,265.42 × 39,378.96
  4. Step 4: Simplify right side
    71,210.34x = 3,869,590,043.56
  5. Step 5: Solve for x
    x = 3,869,590,043.56/71,210.34
  6. Step 6: Final answer
    x = 54,340.28

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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.