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Finding the Fourth Proportional to 65,400.71, 90,255.21 and 38,566.22

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Solution

The fourth proportional to 65,400.71, 90,255.21 and 38,566.22 is: 53,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,400.71 : 90,255.21 = 38,566.22 : x
  2. Step 2: Convert to fraction form
    65,400.71/90,255.21 = 38,566.22/x
  3. Step 3: Cross multiply
    65,400.71x = 90,255.21 × 38,566.22
  4. Step 4: Simplify right side
    65,400.71x = 3,480,802,285.01
  5. Step 5: Solve for x
    x = 3,480,802,285.01/65,400.71
  6. Step 6: Final answer
    x = 53,222.70

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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.