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Finding the Fourth Proportional to 115,233.60, 172,850.40 and 90,350.40

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Solution

The fourth proportional to 115,233.60, 172,850.40 and 90,350.40 is: 135,525.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,233.60 : 172,850.40 = 90,350.40 : x
  2. Step 2: Convert to fraction form
    115,233.60/172,850.40 = 90,350.40/x
  3. Step 3: Cross multiply
    115,233.60x = 172,850.40 × 90,350.40
  4. Step 4: Simplify right side
    115,233.60x = 15,617,102,780.16
  5. Step 5: Solve for x
    x = 15,617,102,780.16/115,233.60
  6. Step 6: Final answer
    x = 135,525.60

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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.