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Finding the Fourth Proportional to 101,391.60, 151,937.64 and 90,319.44

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Solution

The fourth proportional to 101,391.60, 151,937.64 and 90,319.44 is: 135,345.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,391.60 : 151,937.64 = 90,319.44 : x
  2. Step 2: Convert to fraction form
    101,391.60/151,937.64 = 90,319.44/x
  3. Step 3: Cross multiply
    101,391.60x = 151,937.64 × 90,319.44
  4. Step 4: Simplify right side
    101,391.60x = 13,722,922,559.72
  5. Step 5: Solve for x
    x = 13,722,922,559.72/101,391.60
  6. Step 6: Final answer
    x = 135,345.75

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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.