Home / 71,472.09-98,634.60-39,638.82

Finding the Fourth Proportional to 71,472.09, 98,634.60 and 39,638.82

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Solution

The fourth proportional to 71,472.09, 98,634.60 and 39,638.82 is: 54,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,472.09 : 98,634.60 = 39,638.82 : x
  2. Step 2: Convert to fraction form
    71,472.09/98,634.60 = 39,638.82/x
  3. Step 3: Cross multiply
    71,472.09x = 98,634.60 × 39,638.82
  4. Step 4: Simplify right side
    71,472.09x = 3,909,759,155.17
  5. Step 5: Solve for x
    x = 3,909,759,155.17/71,472.09
  6. Step 6: Final answer
    x = 54,703.30

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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.