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Finding the Fourth Proportional to 217,698.60, 326,547.90 and 161,711.40

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Solution

The fourth proportional to 217,698.60, 326,547.90 and 161,711.40 is: 242,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,698.60 : 326,547.90 = 161,711.40 : x
  2. Step 2: Convert to fraction form
    217,698.60/326,547.90 = 161,711.40/x
  3. Step 3: Cross multiply
    217,698.60x = 326,547.90 × 161,711.40
  4. Step 4: Simplify right side
    217,698.60x = 52,806,518,076.06
  5. Step 5: Solve for x
    x = 52,806,518,076.06/217,698.60
  6. Step 6: Final answer
    x = 242,567.10

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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.