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Finding the Fourth Proportional to 125,688.66, 188,418.15 and 114,731.79

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Solution

The fourth proportional to 125,688.66, 188,418.15 and 114,731.79 is: 171,992.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,688.66 : 188,418.15 = 114,731.79 : x
  2. Step 2: Convert to fraction form
    125,688.66/188,418.15 = 114,731.79/x
  3. Step 3: Cross multiply
    125,688.66x = 188,418.15 × 114,731.79
  4. Step 4: Simplify right side
    125,688.66x = 21,617,551,617.99
  5. Step 5: Solve for x
    x = 21,617,551,617.99/125,688.66
  6. Step 6: Final answer
    x = 171,992.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.