Home / 142,784.20-213,917.10-87,315.40

Finding the Fourth Proportional to 142,784.20, 213,917.10 and 87,315.40

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Solution

The fourth proportional to 142,784.20, 213,917.10 and 87,315.40 is: 130,814.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,784.20 : 213,917.10 = 87,315.40 : x
  2. Step 2: Convert to fraction form
    142,784.20/213,917.10 = 87,315.40/x
  3. Step 3: Cross multiply
    142,784.20x = 213,917.10 × 87,315.40
  4. Step 4: Simplify right side
    142,784.20x = 18,678,257,153.34
  5. Step 5: Solve for x
    x = 18,678,257,153.34/142,784.20
  6. Step 6: Final answer
    x = 130,814.59

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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.