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Finding the Fourth Proportional to 112,369.97, 155,064.63 and 61,381.97

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Solution

The fourth proportional to 112,369.97, 155,064.63 and 61,381.97 is: 84,703.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,369.97 : 155,064.63 = 61,381.97 : x
  2. Step 2: Convert to fraction form
    112,369.97/155,064.63 = 61,381.97/x
  3. Step 3: Cross multiply
    112,369.97x = 155,064.63 × 61,381.97
  4. Step 4: Simplify right side
    112,369.97x = 9,518,172,503.07
  5. Step 5: Solve for x
    x = 9,518,172,503.07/112,369.97
  6. Step 6: Final answer
    x = 84,703.88

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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.