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Finding the Fourth Proportional to 71,675.88, 98,908.47 and 39,843.69

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Solution

The fourth proportional to 71,675.88, 98,908.47 and 39,843.69 is: 54,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,675.88 : 98,908.47 = 39,843.69 : x
  2. Step 2: Convert to fraction form
    71,675.88/98,908.47 = 39,843.69/x
  3. Step 3: Cross multiply
    71,675.88x = 98,908.47 × 39,843.69
  4. Step 4: Simplify right side
    71,675.88x = 3,940,878,417.05
  5. Step 5: Solve for x
    x = 3,940,878,417.05/71,675.88
  6. Step 6: Final answer
    x = 54,981.93

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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.