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Finding the Fourth Proportional to 171,490.78, 236,614.53 and 98,915.86

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Solution

The fourth proportional to 171,490.78, 236,614.53 and 98,915.86 is: 136,479.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,490.78 : 236,614.53 = 98,915.86 : x
  2. Step 2: Convert to fraction form
    171,490.78/236,614.53 = 98,915.86/x
  3. Step 3: Cross multiply
    171,490.78x = 236,614.53 × 98,915.86
  4. Step 4: Simplify right side
    171,490.78x = 23,404,929,723.45
  5. Step 5: Solve for x
    x = 23,404,929,723.45/171,490.78
  6. Step 6: Final answer
    x = 136,479.23

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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.