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Finding the Fourth Proportional to 90,002.76, 135,029.20 and 39,392.76

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Solution

The fourth proportional to 90,002.76, 135,029.20 and 39,392.76 is: 59,100.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,002.76 : 135,029.20 = 39,392.76 : x
  2. Step 2: Convert to fraction form
    90,002.76/135,029.20 = 39,392.76/x
  3. Step 3: Cross multiply
    90,002.76x = 135,029.20 × 39,392.76
  4. Step 4: Simplify right side
    90,002.76x = 5,319,172,868.59
  5. Step 5: Solve for x
    x = 5,319,172,868.59/90,002.76
  6. Step 6: Final answer
    x = 59,100.11

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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.