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Finding the Fourth Proportional to 101,350.40, 151,718.40 and 90,291.20

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Solution

The fourth proportional to 101,350.40, 151,718.40 and 90,291.20 is: 135,163.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,350.40 : 151,718.40 = 90,291.20 : x
  2. Step 2: Convert to fraction form
    101,350.40/151,718.40 = 90,291.20/x
  3. Step 3: Cross multiply
    101,350.40x = 151,718.40 × 90,291.20
  4. Step 4: Simplify right side
    101,350.40x = 13,698,836,398.08
  5. Step 5: Solve for x
    x = 13,698,836,398.08/101,350.40
  6. Step 6: Final answer
    x = 135,163.12

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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.