Home / 90,717.90-136,076.85-65,640.30

Finding the Fourth Proportional to 90,717.90, 136,076.85 and 65,640.30

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Solution

The fourth proportional to 90,717.90, 136,076.85 and 65,640.30 is: 98,460.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,717.90 : 136,076.85 = 65,640.30 : x
  2. Step 2: Convert to fraction form
    90,717.90/136,076.85 = 65,640.30/x
  3. Step 3: Cross multiply
    90,717.90x = 136,076.85 × 65,640.30
  4. Step 4: Simplify right side
    90,717.90x = 8,932,125,257.06
  5. Step 5: Solve for x
    x = 8,932,125,257.06/90,717.90
  6. Step 6: Final answer
    x = 98,460.45

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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.