Home / 156,780.78-216,274.54-99,318.72

Finding the Fourth Proportional to 156,780.78, 216,274.54 and 99,318.72

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Solution

The fourth proportional to 156,780.78, 216,274.54 and 99,318.72 is: 137,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,780.78 : 216,274.54 = 99,318.72 : x
  2. Step 2: Convert to fraction form
    156,780.78/216,274.54 = 99,318.72/x
  3. Step 3: Cross multiply
    156,780.78x = 216,274.54 × 99,318.72
  4. Step 4: Simplify right side
    156,780.78x = 21,480,110,481.39
  5. Step 5: Solve for x
    x = 21,480,110,481.39/156,780.78
  6. Step 6: Final answer
    x = 137,007.29

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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.