Home / 90,878.82-125,377.92-56,407.38

Finding the Fourth Proportional to 90,878.82, 125,377.92 and 56,407.38

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Solution

The fourth proportional to 90,878.82, 125,377.92 and 56,407.38 is: 77,820.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,878.82 : 125,377.92 = 56,407.38 : x
  2. Step 2: Convert to fraction form
    90,878.82/125,377.92 = 56,407.38/x
  3. Step 3: Cross multiply
    90,878.82x = 125,377.92 × 56,407.38
  4. Step 4: Simplify right side
    90,878.82x = 7,072,239,977.05
  5. Step 5: Solve for x
    x = 7,072,239,977.05/90,878.82
  6. Step 6: Final answer
    x = 77,820.55

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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.