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Finding the Fourth Proportional to 50,679.52, 69,941.28 and 28,019.20

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Solution

The fourth proportional to 50,679.52, 69,941.28 and 28,019.20 is: 38,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,679.52 : 69,941.28 = 28,019.20 : x
  2. Step 2: Convert to fraction form
    50,679.52/69,941.28 = 28,019.20/x
  3. Step 3: Cross multiply
    50,679.52x = 69,941.28 × 28,019.20
  4. Step 4: Simplify right side
    50,679.52x = 1,959,698,712.58
  5. Step 5: Solve for x
    x = 1,959,698,712.58/50,679.52
  6. Step 6: Final answer
    x = 38,668.45

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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.