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Finding the Fourth Proportional to 90,859.75, 136,295.10 and 28,530.25

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Solution

The fourth proportional to 90,859.75, 136,295.10 and 28,530.25 is: 42,797.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,859.75 : 136,295.10 = 28,530.25 : x
  2. Step 2: Convert to fraction form
    90,859.75/136,295.10 = 28,530.25/x
  3. Step 3: Cross multiply
    90,859.75x = 136,295.10 × 28,530.25
  4. Step 4: Simplify right side
    90,859.75x = 3,888,533,276.78
  5. Step 5: Solve for x
    x = 3,888,533,276.78/90,859.75
  6. Step 6: Final answer
    x = 42,797.09

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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.