Home / 142,015.20-212,763.60-86,546.40

Finding the Fourth Proportional to 142,015.20, 212,763.60 and 86,546.40

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Solution

The fourth proportional to 142,015.20, 212,763.60 and 86,546.40 is: 129,661.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,015.20 : 212,763.60 = 86,546.40 : x
  2. Step 2: Convert to fraction form
    142,015.20/212,763.60 = 86,546.40/x
  3. Step 3: Cross multiply
    142,015.20x = 212,763.60 × 86,546.40
  4. Step 4: Simplify right side
    142,015.20x = 18,413,923,631.04
  5. Step 5: Solve for x
    x = 18,413,923,631.04/142,015.20
  6. Step 6: Final answer
    x = 129,661.64

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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.