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Finding the Fourth Proportional to 112,763.75, 155,607.28 and 61,766.28

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Solution

The fourth proportional to 112,763.75, 155,607.28 and 61,766.28 is: 85,233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,763.75 : 155,607.28 = 61,766.28 : x
  2. Step 2: Convert to fraction form
    112,763.75/155,607.28 = 61,766.28/x
  3. Step 3: Cross multiply
    112,763.75x = 155,607.28 × 61,766.28
  4. Step 4: Simplify right side
    112,763.75x = 9,611,282,672.10
  5. Step 5: Solve for x
    x = 9,611,282,672.10/112,763.75
  6. Step 6: Final answer
    x = 85,233.80

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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.