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Finding the Fourth Proportional to 71,476.98, 98,629.77 and 39,638.10

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Solution

The fourth proportional to 71,476.98, 98,629.77 and 39,638.10 is: 54,695.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,476.98 : 98,629.77 = 39,638.10 : x
  2. Step 2: Convert to fraction form
    71,476.98/98,629.77 = 39,638.10/x
  3. Step 3: Cross multiply
    71,476.98x = 98,629.77 × 39,638.10
  4. Step 4: Simplify right side
    71,476.98x = 3,909,496,686.24
  5. Step 5: Solve for x
    x = 3,909,496,686.24/71,476.98
  6. Step 6: Final answer
    x = 54,695.89

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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.