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Finding the Fourth Proportional to 90,873.66, 136,315.92 and 28,544.16

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Solution

The fourth proportional to 90,873.66, 136,315.92 and 28,544.16 is: 42,817.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,873.66 : 136,315.92 = 28,544.16 : x
  2. Step 2: Convert to fraction form
    90,873.66/136,315.92 = 28,544.16/x
  3. Step 3: Cross multiply
    90,873.66x = 136,315.92 × 28,544.16
  4. Step 4: Simplify right side
    90,873.66x = 3,891,023,431.03
  5. Step 5: Solve for x
    x = 3,891,023,431.03/90,873.66
  6. Step 6: Final answer
    x = 42,817.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.