Home / 142,023.20-212,775.60-86,554.40

Finding the Fourth Proportional to 142,023.20, 212,775.60 and 86,554.40

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Solution

The fourth proportional to 142,023.20, 212,775.60 and 86,554.40 is: 129,673.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,023.20 : 212,775.60 = 86,554.40 : x
  2. Step 2: Convert to fraction form
    142,023.20/212,775.60 = 86,554.40/x
  3. Step 3: Cross multiply
    142,023.20x = 212,775.60 × 86,554.40
  4. Step 4: Simplify right side
    142,023.20x = 18,416,664,392.64
  5. Step 5: Solve for x
    x = 18,416,664,392.64/142,023.20
  6. Step 6: Final answer
    x = 129,673.63

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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.