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Finding the Fourth Proportional to 186,787.89, 257,728.77 and 118,780.29

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Solution

The fourth proportional to 186,787.89, 257,728.77 and 118,780.29 is: 163,892.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,787.89 : 257,728.77 = 118,780.29 : x
  2. Step 2: Convert to fraction form
    186,787.89/257,728.77 = 118,780.29/x
  3. Step 3: Cross multiply
    186,787.89x = 257,728.77 × 118,780.29
  4. Step 4: Simplify right side
    186,787.89x = 30,613,098,041.94
  5. Step 5: Solve for x
    x = 30,613,098,041.94/186,787.89
  6. Step 6: Final answer
    x = 163,892.31

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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.