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Finding the Fourth Proportional to 112,880.88, 155,769.12 and 61,883.76

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Solution

The fourth proportional to 112,880.88, 155,769.12 and 61,883.76 is: 85,396.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,880.88 : 155,769.12 = 61,883.76 : x
  2. Step 2: Convert to fraction form
    112,880.88/155,769.12 = 61,883.76/x
  3. Step 3: Cross multiply
    112,880.88x = 155,769.12 × 61,883.76
  4. Step 4: Simplify right side
    112,880.88x = 9,639,578,837.49
  5. Step 5: Solve for x
    x = 9,639,578,837.49/112,880.88
  6. Step 6: Final answer
    x = 85,396.03

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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.