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Finding the Fourth Proportional to 90,632.32, 136,052.16 and 85,448.32

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Solution

The fourth proportional to 90,632.32, 136,052.16 and 85,448.32 is: 128,270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,632.32 : 136,052.16 = 85,448.32 : x
  2. Step 2: Convert to fraction form
    90,632.32/136,052.16 = 85,448.32/x
  3. Step 3: Cross multiply
    90,632.32x = 136,052.16 × 85,448.32
  4. Step 4: Simplify right side
    90,632.32x = 11,625,428,504.37
  5. Step 5: Solve for x
    x = 11,625,428,504.37/90,632.32
  6. Step 6: Final answer
    x = 128,270.23

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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.