Home / 90,128.60-135,269.70-40,285.40

Finding the Fourth Proportional to 90,128.60, 135,269.70 and 40,285.40

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Solution

The fourth proportional to 90,128.60, 135,269.70 and 40,285.40 is: 60,462.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,128.60 : 135,269.70 = 40,285.40 : x
  2. Step 2: Convert to fraction form
    90,128.60/135,269.70 = 40,285.40/x
  3. Step 3: Cross multiply
    90,128.60x = 135,269.70 × 40,285.40
  4. Step 4: Simplify right side
    90,128.60x = 5,449,393,972.38
  5. Step 5: Solve for x
    x = 5,449,393,972.38/90,128.60
  6. Step 6: Final answer
    x = 60,462.43

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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.