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Finding the Fourth Proportional to 72,160.82, 99,573.28 and 39,891.07

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Solution

The fourth proportional to 72,160.82, 99,573.28 and 39,891.07 is: 55,044.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,160.82 : 99,573.28 = 39,891.07 : x
  2. Step 2: Convert to fraction form
    72,160.82/99,573.28 = 39,891.07/x
  3. Step 3: Cross multiply
    72,160.82x = 99,573.28 × 39,891.07
  4. Step 4: Simplify right side
    72,160.82x = 3,972,084,682.61
  5. Step 5: Solve for x
    x = 3,972,084,682.61/72,160.82
  6. Step 6: Final answer
    x = 55,044.89

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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.