Home / 112,765.25-155,609.34-61,767.78

Finding the Fourth Proportional to 112,765.25, 155,609.34 and 61,767.78

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Solution

The fourth proportional to 112,765.25, 155,609.34 and 61,767.78 is: 85,235.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,765.25 : 155,609.34 = 61,767.78 : x
  2. Step 2: Convert to fraction form
    112,765.25/155,609.34 = 61,767.78/x
  3. Step 3: Cross multiply
    112,765.25x = 155,609.34 × 61,767.78
  4. Step 4: Simplify right side
    112,765.25x = 9,611,643,479.07
  5. Step 5: Solve for x
    x = 9,611,643,479.07/112,765.25
  6. Step 6: Final answer
    x = 85,235.87

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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.