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Finding the Fourth Proportional to 140,665.32, 210,929.90 and 51,960.60

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Solution

The fourth proportional to 140,665.32, 210,929.90 and 51,960.60 is: 77,915.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,665.32 : 210,929.90 = 51,960.60 : x
  2. Step 2: Convert to fraction form
    140,665.32/210,929.90 = 51,960.60/x
  3. Step 3: Cross multiply
    140,665.32x = 210,929.90 × 51,960.60
  4. Step 4: Simplify right side
    140,665.32x = 10,960,044,161.94
  5. Step 5: Solve for x
    x = 10,960,044,161.94/140,665.32
  6. Step 6: Final answer
    x = 77,915.75

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1.5x scale

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.