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Finding the Fourth Proportional to 86,118.97, 118,849.55 and 47,878.82

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Solution

The fourth proportional to 86,118.97, 118,849.55 and 47,878.82 is: 66,075.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,118.97 : 118,849.55 = 47,878.82 : x
  2. Step 2: Convert to fraction form
    86,118.97/118,849.55 = 47,878.82/x
  3. Step 3: Cross multiply
    86,118.97x = 118,849.55 × 47,878.82
  4. Step 4: Simplify right side
    86,118.97x = 5,690,376,561.82
  5. Step 5: Solve for x
    x = 5,690,376,561.82/86,118.97
  6. Step 6: Final answer
    x = 66,075.76

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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.