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Finding the Fourth Proportional to 77,109.66, 106,379.13 and 51,915.42

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Solution

The fourth proportional to 77,109.66, 106,379.13 and 51,915.42 is: 71,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,109.66 : 106,379.13 = 51,915.42 : x
  2. Step 2: Convert to fraction form
    77,109.66/106,379.13 = 51,915.42/x
  3. Step 3: Cross multiply
    77,109.66x = 106,379.13 × 51,915.42
  4. Step 4: Simplify right side
    77,109.66x = 5,522,717,213.18
  5. Step 5: Solve for x
    x = 5,522,717,213.18/77,109.66
  6. Step 6: Final answer
    x = 71,621.60

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1.5x scale

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.