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Finding the Fourth Proportional to 260,054.20, 390,154.20 and 126,938.80

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Solution

The fourth proportional to 260,054.20, 390,154.20 and 126,938.80 is: 190,443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,054.20 : 390,154.20 = 126,938.80 : x
  2. Step 2: Convert to fraction form
    260,054.20/390,154.20 = 126,938.80/x
  3. Step 3: Cross multiply
    260,054.20x = 390,154.20 × 126,938.80
  4. Step 4: Simplify right side
    260,054.20x = 49,525,705,962.96
  5. Step 5: Solve for x
    x = 49,525,705,962.96/260,054.20
  6. Step 6: Final answer
    x = 190,443.78

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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.