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Finding the Fourth Proportional to 90,636.60, 135,900.90 and 55,601.40

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Solution

The fourth proportional to 90,636.60, 135,900.90 and 55,601.40 is: 83,368.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,636.60 : 135,900.90 = 55,601.40 : x
  2. Step 2: Convert to fraction form
    90,636.60/135,900.90 = 55,601.40/x
  3. Step 3: Cross multiply
    90,636.60x = 135,900.90 × 55,601.40
  4. Step 4: Simplify right side
    90,636.60x = 7,556,280,301.26
  5. Step 5: Solve for x
    x = 7,556,280,301.26/90,636.60
  6. Step 6: Final answer
    x = 83,368.97

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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.