Home / 65,498.10-90,387.41-38,640.66

Finding the Fourth Proportional to 65,498.10, 90,387.41 and 38,640.66

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Solution

The fourth proportional to 65,498.10, 90,387.41 and 38,640.66 is: 53,324.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,498.10 : 90,387.41 = 38,640.66 : x
  2. Step 2: Convert to fraction form
    65,498.10/90,387.41 = 38,640.66/x
  3. Step 3: Cross multiply
    65,498.10x = 90,387.41 × 38,640.66
  4. Step 4: Simplify right side
    65,498.10x = 3,492,628,984.89
  5. Step 5: Solve for x
    x = 3,492,628,984.89/65,498.10
  6. Step 6: Final answer
    x = 53,324.13

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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.