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Finding the Fourth Proportional to 154,486.80, 231,292.80 and 138,740.40

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Solution

The fourth proportional to 154,486.80, 231,292.80 and 138,740.40 is: 207,717.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,486.80 : 231,292.80 = 138,740.40 : x
  2. Step 2: Convert to fraction form
    154,486.80/231,292.80 = 138,740.40/x
  3. Step 3: Cross multiply
    154,486.80x = 231,292.80 × 138,740.40
  4. Step 4: Simplify right side
    154,486.80x = 32,089,655,589.12
  5. Step 5: Solve for x
    x = 32,089,655,589.12/154,486.80
  6. Step 6: Final answer
    x = 207,717.78

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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.