Home / 102,021.17-140,789.09-56,697.72

Finding the Fourth Proportional to 102,021.17, 140,789.09 and 56,697.72

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Solution

The fourth proportional to 102,021.17, 140,789.09 and 56,697.72 is: 78,242.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,021.17 : 140,789.09 = 56,697.72 : x
  2. Step 2: Convert to fraction form
    102,021.17/140,789.09 = 56,697.72/x
  3. Step 3: Cross multiply
    102,021.17x = 140,789.09 × 56,697.72
  4. Step 4: Simplify right side
    102,021.17x = 7,982,420,403.87
  5. Step 5: Solve for x
    x = 7,982,420,403.87/102,021.17
  6. Step 6: Final answer
    x = 78,242.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.