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Finding the Fourth Proportional to 217,079.40, 325,521.90 and 83,915.40

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Solution

The fourth proportional to 217,079.40, 325,521.90 and 83,915.40 is: 125,835.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,079.40 : 325,521.90 = 83,915.40 : x
  2. Step 2: Convert to fraction form
    217,079.40/325,521.90 = 83,915.40/x
  3. Step 3: Cross multiply
    217,079.40x = 325,521.90 × 83,915.40
  4. Step 4: Simplify right side
    217,079.40x = 27,316,300,447.26
  5. Step 5: Solve for x
    x = 27,316,300,447.26/217,079.40
  6. Step 6: Final answer
    x = 125,835.53

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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.