Home / 142,025.20-212,778.60-86,556.40

Finding the Fourth Proportional to 142,025.20, 212,778.60 and 86,556.40

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Solution

The fourth proportional to 142,025.20, 212,778.60 and 86,556.40 is: 129,676.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,025.20 : 212,778.60 = 86,556.40 : x
  2. Step 2: Convert to fraction form
    142,025.20/212,778.60 = 86,556.40/x
  3. Step 3: Cross multiply
    142,025.20x = 212,778.60 × 86,556.40
  4. Step 4: Simplify right side
    142,025.20x = 18,417,349,613.04
  5. Step 5: Solve for x
    x = 18,417,349,613.04/142,025.20
  6. Step 6: Final answer
    x = 129,676.63

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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.