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Finding the Fourth Proportional to 90,339.36, 135,499.32 and 31,168.32

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Solution

The fourth proportional to 90,339.36, 135,499.32 and 31,168.32 is: 46,749.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,339.36 : 135,499.32 = 31,168.32 : x
  2. Step 2: Convert to fraction form
    90,339.36/135,499.32 = 31,168.32/x
  3. Step 3: Cross multiply
    90,339.36x = 135,499.32 × 31,168.32
  4. Step 4: Simplify right side
    90,339.36x = 4,223,286,165.54
  5. Step 5: Solve for x
    x = 4,223,286,165.54/90,339.36
  6. Step 6: Final answer
    x = 46,749.13

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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.