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Finding the Fourth Proportional to 65,718.72, 90,708.12 and 37,441.20

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Solution

The fourth proportional to 65,718.72, 90,708.12 and 37,441.20 is: 51,678.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.72 : 90,708.12 = 37,441.20 : x
  2. Step 2: Convert to fraction form
    65,718.72/90,708.12 = 37,441.20/x
  3. Step 3: Cross multiply
    65,718.72x = 90,708.12 × 37,441.20
  4. Step 4: Simplify right side
    65,718.72x = 3,396,220,862.54
  5. Step 5: Solve for x
    x = 3,396,220,862.54/65,718.72
  6. Step 6: Final answer
    x = 51,678.13

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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.