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Finding the Fourth Proportional to 212,898.40, 319,329.60 and 65,154.40

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Solution

The fourth proportional to 212,898.40, 319,329.60 and 65,154.40 is: 97,726.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,898.40 : 319,329.60 = 65,154.40 : x
  2. Step 2: Convert to fraction form
    212,898.40/319,329.60 = 65,154.40/x
  3. Step 3: Cross multiply
    212,898.40x = 319,329.60 × 65,154.40
  4. Step 4: Simplify right side
    212,898.40x = 20,805,728,490.24
  5. Step 5: Solve for x
    x = 20,805,728,490.24/212,898.40
  6. Step 6: Final answer
    x = 97,726.09

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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.