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Finding the Fourth Proportional to 71,264.40, 98,346.42 and 39,435.54

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Solution

The fourth proportional to 71,264.40, 98,346.42 and 39,435.54 is: 54,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,264.40 : 98,346.42 = 39,435.54 : x
  2. Step 2: Convert to fraction form
    71,264.40/98,346.42 = 39,435.54/x
  3. Step 3: Cross multiply
    71,264.40x = 98,346.42 × 39,435.54
  4. Step 4: Simplify right side
    71,264.40x = 3,878,344,179.77
  5. Step 5: Solve for x
    x = 3,878,344,179.77/71,264.40
  6. Step 6: Final answer
    x = 54,421.90

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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.