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Finding the Fourth Proportional to 86,927.10, 121,872.90 and 86,927.10

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Solution

The fourth proportional to 86,927.10, 121,872.90 and 86,927.10 is: 121,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,927.10 : 121,872.90 = 86,927.10 : x
  2. Step 2: Convert to fraction form
    86,927.10/121,872.90 = 86,927.10/x
  3. Step 3: Cross multiply
    86,927.10x = 121,872.90 × 86,927.10
  4. Step 4: Simplify right side
    86,927.10x = 10,594,057,765.59
  5. Step 5: Solve for x
    x = 10,594,057,765.59/86,927.10
  6. Step 6: Final answer
    x = 121,872.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.