Home / 142,714.20-213,812.10-87,245.40

Finding the Fourth Proportional to 142,714.20, 213,812.10 and 87,245.40

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Solution

The fourth proportional to 142,714.20, 213,812.10 and 87,245.40 is: 130,709.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,714.20 : 213,812.10 = 87,245.40 : x
  2. Step 2: Convert to fraction form
    142,714.20/213,812.10 = 87,245.40/x
  3. Step 3: Cross multiply
    142,714.20x = 213,812.10 × 87,245.40
  4. Step 4: Simplify right side
    142,714.20x = 18,654,122,189.34
  5. Step 5: Solve for x
    x = 18,654,122,189.34/142,714.20
  6. Step 6: Final answer
    x = 130,709.64

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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.