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Finding the Fourth Proportional to 65,884.48, 90,919.20 and 40,382.08

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Solution

The fourth proportional to 65,884.48, 90,919.20 and 40,382.08 is: 55,726.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,884.48 : 90,919.20 = 40,382.08 : x
  2. Step 2: Convert to fraction form
    65,884.48/90,919.20 = 40,382.08/x
  3. Step 3: Cross multiply
    65,884.48x = 90,919.20 × 40,382.08
  4. Step 4: Simplify right side
    65,884.48x = 3,671,506,407.94
  5. Step 5: Solve for x
    x = 3,671,506,407.94/65,884.48
  6. Step 6: Final answer
    x = 55,726.42

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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.