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Finding the Fourth Proportional to 90,285.66, 135,480.34 and 70,508.70

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Solution

The fourth proportional to 90,285.66, 135,480.34 and 70,508.70 is: 105,803.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,285.66 : 135,480.34 = 70,508.70 : x
  2. Step 2: Convert to fraction form
    90,285.66/135,480.34 = 70,508.70/x
  3. Step 3: Cross multiply
    90,285.66x = 135,480.34 × 70,508.70
  4. Step 4: Simplify right side
    90,285.66x = 9,552,542,648.96
  5. Step 5: Solve for x
    x = 9,552,542,648.96/90,285.66
  6. Step 6: Final answer
    x = 105,803.54

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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.