Home / 210,785.18-290,885.84-115,289.82

Finding the Fourth Proportional to 210,785.18, 290,885.84 and 115,289.82

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Solution

The fourth proportional to 210,785.18, 290,885.84 and 115,289.82 is: 159,101.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,785.18 : 290,885.84 = 115,289.82 : x
  2. Step 2: Convert to fraction form
    210,785.18/290,885.84 = 115,289.82/x
  3. Step 3: Cross multiply
    210,785.18x = 290,885.84 × 115,289.82
  4. Step 4: Simplify right side
    210,785.18x = 33,536,175,557.70
  5. Step 5: Solve for x
    x = 33,536,175,557.70/210,785.18
  6. Step 6: Final answer
    x = 159,101.21

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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.