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Finding the Fourth Proportional to 112,765.50, 155,616.39 and 68,053.50

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Solution

The fourth proportional to 112,765.50, 155,616.39 and 68,053.50 is: 93,913.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,765.50 : 155,616.39 = 68,053.50 : x
  2. Step 2: Convert to fraction form
    112,765.50/155,616.39 = 68,053.50/x
  3. Step 3: Cross multiply
    112,765.50x = 155,616.39 × 68,053.50
  4. Step 4: Simplify right side
    112,765.50x = 10,590,239,996.87
  5. Step 5: Solve for x
    x = 10,590,239,996.87/112,765.50
  6. Step 6: Final answer
    x = 93,913.83

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1.5x scale

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.