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Finding the Fourth Proportional to 112,410.69, 155,122.16 and 61,425.20

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Solution

The fourth proportional to 112,410.69, 155,122.16 and 61,425.20 is: 84,764.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,410.69 : 155,122.16 = 61,425.20 : x
  2. Step 2: Convert to fraction form
    112,410.69/155,122.16 = 61,425.20/x
  3. Step 3: Cross multiply
    112,410.69x = 155,122.16 × 61,425.20
  4. Step 4: Simplify right side
    112,410.69x = 9,528,408,619.70
  5. Step 5: Solve for x
    x = 9,528,408,619.70/112,410.69
  6. Step 6: Final answer
    x = 84,764.26

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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.