Home / 90,878.67-136,106.39-87,725.75

Finding the Fourth Proportional to 90,878.67, 136,106.39 and 87,725.75

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Solution

The fourth proportional to 90,878.67, 136,106.39 and 87,725.75 is: 131,384.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,878.67 : 136,106.39 = 87,725.75 : x
  2. Step 2: Convert to fraction form
    90,878.67/136,106.39 = 87,725.75/x
  3. Step 3: Cross multiply
    90,878.67x = 136,106.39 × 87,725.75
  4. Step 4: Simplify right side
    90,878.67x = 11,940,034,681.32
  5. Step 5: Solve for x
    x = 11,940,034,681.32/90,878.67
  6. Step 6: Final answer
    x = 131,384.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.