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Finding the Fourth Proportional to 186,647.79, 279,794.31 and 118,989.90

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Solution

The fourth proportional to 186,647.79, 279,794.31 and 118,989.90 is: 178,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,647.79 : 279,794.31 = 118,989.90 : x
  2. Step 2: Convert to fraction form
    186,647.79/279,794.31 = 118,989.90/x
  3. Step 3: Cross multiply
    186,647.79x = 279,794.31 × 118,989.90
  4. Step 4: Simplify right side
    186,647.79x = 33,292,696,967.47
  5. Step 5: Solve for x
    x = 33,292,696,967.47/186,647.79
  6. Step 6: Final answer
    x = 178,371.77

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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.