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Finding the Fourth Proportional to 65,515.80, 90,402.67 and 36,831.54

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Solution

The fourth proportional to 65,515.80, 90,402.67 and 36,831.54 is: 50,822.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,515.80 : 90,402.67 = 36,831.54 : x
  2. Step 2: Convert to fraction form
    65,515.80/90,402.67 = 36,831.54/x
  3. Step 3: Cross multiply
    65,515.80x = 90,402.67 × 36,831.54
  4. Step 4: Simplify right side
    65,515.80x = 3,329,669,556.21
  5. Step 5: Solve for x
    x = 3,329,669,556.21/65,515.80
  6. Step 6: Final answer
    x = 50,822.39

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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.