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Finding the Fourth Proportional to 50,812.80, 70,120.72 and 28,151.72

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Solution

The fourth proportional to 50,812.80, 70,120.72 and 28,151.72 is: 38,848.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,812.80 : 70,120.72 = 28,151.72 : x
  2. Step 2: Convert to fraction form
    50,812.80/70,120.72 = 28,151.72/x
  3. Step 3: Cross multiply
    50,812.80x = 70,120.72 × 28,151.72
  4. Step 4: Simplify right side
    50,812.80x = 1,974,018,875.64
  5. Step 5: Solve for x
    x = 1,974,018,875.64/50,812.80
  6. Step 6: Final answer
    x = 38,848.85

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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.