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Finding the Fourth Proportional to 90,883.20, 136,033.20 and 64,639.20

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Solution

The fourth proportional to 90,883.20, 136,033.20 and 64,639.20 is: 96,751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,883.20 : 136,033.20 = 64,639.20 : x
  2. Step 2: Convert to fraction form
    90,883.20/136,033.20 = 64,639.20/x
  3. Step 3: Cross multiply
    90,883.20x = 136,033.20 × 64,639.20
  4. Step 4: Simplify right side
    90,883.20x = 8,793,077,221.44
  5. Step 5: Solve for x
    x = 8,793,077,221.44/90,883.20
  6. Step 6: Final answer
    x = 96,751.40

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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.