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Finding the Fourth Proportional to 260,161.40, 390,047.70 and 141,966.20

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Solution

The fourth proportional to 260,161.40, 390,047.70 and 141,966.20 is: 212,843.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,161.40 : 390,047.70 = 141,966.20 : x
  2. Step 2: Convert to fraction form
    260,161.40/390,047.70 = 141,966.20/x
  3. Step 3: Cross multiply
    260,161.40x = 390,047.70 × 141,966.20
  4. Step 4: Simplify right side
    260,161.40x = 55,373,589,787.74
  5. Step 5: Solve for x
    x = 55,373,589,787.74/260,161.40
  6. Step 6: Final answer
    x = 212,843.22

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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.