Home / 65,418.28-90,307.62-38,551.72

Finding the Fourth Proportional to 65,418.28, 90,307.62 and 38,551.72

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Solution

The fourth proportional to 65,418.28, 90,307.62 and 38,551.72 is: 53,219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,418.28 : 90,307.62 = 38,551.72 : x
  2. Step 2: Convert to fraction form
    65,418.28/90,307.62 = 38,551.72/x
  3. Step 3: Cross multiply
    65,418.28x = 90,307.62 × 38,551.72
  4. Step 4: Simplify right side
    65,418.28x = 3,481,514,080.11
  5. Step 5: Solve for x
    x = 3,481,514,080.11/65,418.28
  6. Step 6: Final answer
    x = 53,219.28

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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.