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Finding the Fourth Proportional to 65,891.12, 90,923.48 and 39,033.68

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Solution

The fourth proportional to 65,891.12, 90,923.48 and 39,033.68 is: 53,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.12 : 90,923.48 = 39,033.68 : x
  2. Step 2: Convert to fraction form
    65,891.12/90,923.48 = 39,033.68/x
  3. Step 3: Cross multiply
    65,891.12x = 90,923.48 × 39,033.68
  4. Step 4: Simplify right side
    65,891.12x = 3,549,078,022.81
  5. Step 5: Solve for x
    x = 3,549,078,022.81/65,891.12
  6. Step 6: Final answer
    x = 53,862.77

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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.