Home / 112,515.84-155,339.24-70,131.78

Finding the Fourth Proportional to 112,515.84, 155,339.24 and 70,131.78

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Solution

The fourth proportional to 112,515.84, 155,339.24 and 70,131.78 is: 96,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,515.84 : 155,339.24 = 70,131.78 : x
  2. Step 2: Convert to fraction form
    112,515.84/155,339.24 = 70,131.78/x
  3. Step 3: Cross multiply
    112,515.84x = 155,339.24 × 70,131.78
  4. Step 4: Simplify right side
    112,515.84x = 10,894,217,054.39
  5. Step 5: Solve for x
    x = 10,894,217,054.39/112,515.84
  6. Step 6: Final answer
    x = 96,823.85

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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.