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Finding the Fourth Proportional to 50,915.71, 70,261.82 and 28,255.69

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Solution

The fourth proportional to 50,915.71, 70,261.82 and 28,255.69 is: 38,991.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,915.71 : 70,261.82 = 28,255.69 : x
  2. Step 2: Convert to fraction form
    50,915.71/70,261.82 = 28,255.69/x
  3. Step 3: Cross multiply
    50,915.71x = 70,261.82 × 28,255.69
  4. Step 4: Simplify right side
    50,915.71x = 1,985,295,712.17
  5. Step 5: Solve for x
    x = 1,985,295,712.17/50,915.71
  6. Step 6: Final answer
    x = 38,991.81

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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.