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Finding the Fourth Proportional to 112,864.59, 155,754.88 and 61,881.97

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Solution

The fourth proportional to 112,864.59, 155,754.88 and 61,881.97 is: 85,398.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,864.59 : 155,754.88 = 61,881.97 : x
  2. Step 2: Convert to fraction form
    112,864.59/155,754.88 = 61,881.97/x
  3. Step 3: Cross multiply
    112,864.59x = 155,754.88 × 61,881.97
  4. Step 4: Simplify right side
    112,864.59x = 9,638,418,811.51
  5. Step 5: Solve for x
    x = 9,638,418,811.51/112,864.59
  6. Step 6: Final answer
    x = 85,398.08

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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.