Home / 142,017.20-212,766.60-86,548.40

Finding the Fourth Proportional to 142,017.20, 212,766.60 and 86,548.40

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Solution

The fourth proportional to 142,017.20, 212,766.60 and 86,548.40 is: 129,664.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,017.20 : 212,766.60 = 86,548.40 : x
  2. Step 2: Convert to fraction form
    142,017.20/212,766.60 = 86,548.40/x
  3. Step 3: Cross multiply
    142,017.20x = 212,766.60 × 86,548.40
  4. Step 4: Simplify right side
    142,017.20x = 18,414,608,803.44
  5. Step 5: Solve for x
    x = 18,414,608,803.44/142,017.20
  6. Step 6: Final answer
    x = 129,664.64

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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.