Home / 156,783.78-216,278.68-99,321.72

Finding the Fourth Proportional to 156,783.78, 216,278.68 and 99,321.72

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Solution

The fourth proportional to 156,783.78, 216,278.68 and 99,321.72 is: 137,011.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,783.78 : 216,278.68 = 99,321.72 : x
  2. Step 2: Convert to fraction form
    156,783.78/216,278.68 = 99,321.72/x
  3. Step 3: Cross multiply
    156,783.78x = 216,278.68 × 99,321.72
  4. Step 4: Simplify right side
    156,783.78x = 21,481,170,496.93
  5. Step 5: Solve for x
    x = 21,481,170,496.93/156,783.78
  6. Step 6: Final answer
    x = 137,011.43

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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.