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Finding the Fourth Proportional to 90,272.80, 135,409.20 and 64,007.20

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Solution

The fourth proportional to 90,272.80, 135,409.20 and 64,007.20 is: 96,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,272.80 : 135,409.20 = 64,007.20 : x
  2. Step 2: Convert to fraction form
    90,272.80/135,409.20 = 64,007.20/x
  3. Step 3: Cross multiply
    90,272.80x = 135,409.20 × 64,007.20
  4. Step 4: Simplify right side
    90,272.80x = 8,667,163,746.24
  5. Step 5: Solve for x
    x = 8,667,163,746.24/90,272.80
  6. Step 6: Final answer
    x = 96,010.80

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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.