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Finding the Fourth Proportional to 163,986.60, 245,979.90 and 147,916.20

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Solution

The fourth proportional to 163,986.60, 245,979.90 and 147,916.20 is: 221,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,986.60 : 245,979.90 = 147,916.20 : x
  2. Step 2: Convert to fraction form
    163,986.60/245,979.90 = 147,916.20/x
  3. Step 3: Cross multiply
    163,986.60x = 245,979.90 × 147,916.20
  4. Step 4: Simplify right side
    163,986.60x = 36,384,412,084.38
  5. Step 5: Solve for x
    x = 36,384,412,084.38/163,986.60
  6. Step 6: Final answer
    x = 221,874.30

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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.