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Finding the Fourth Proportional to 65,977.20, 91,001.88 and 40,484.88

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Solution

The fourth proportional to 65,977.20, 91,001.88 and 40,484.88 is: 55,840.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,977.20 : 91,001.88 = 40,484.88 : x
  2. Step 2: Convert to fraction form
    65,977.20/91,001.88 = 40,484.88/x
  3. Step 3: Cross multiply
    65,977.20x = 91,001.88 × 40,484.88
  4. Step 4: Simplify right side
    65,977.20x = 3,684,200,191.57
  5. Step 5: Solve for x
    x = 3,684,200,191.57/65,977.20
  6. Step 6: Final answer
    x = 55,840.51

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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.