Home / 90,746.64-136,119.96-28,422

Finding the Fourth Proportional to 90,746.64, 136,119.96 and 28,422

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Solution

The fourth proportional to 90,746.64, 136,119.96 and 28,422 is: 42,633

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,746.64 : 136,119.96 = 28,422 : x
  2. Step 2: Convert to fraction form
    90,746.64/136,119.96 = 28,422/x
  3. Step 3: Cross multiply
    90,746.64x = 136,119.96 × 28,422
  4. Step 4: Simplify right side
    90,746.64x = 3,868,801,503.12
  5. Step 5: Solve for x
    x = 3,868,801,503.12/90,746.64
  6. Step 6: Final answer
    x = 42,633

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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.