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Finding the Fourth Proportional to 51,232, 70,700.16 and 28,876

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Solution

The fourth proportional to 51,232, 70,700.16 and 28,876 is: 39,848.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,232 : 70,700.16 = 28,876 : x
  2. Step 2: Convert to fraction form
    51,232/70,700.16 = 28,876/x
  3. Step 3: Cross multiply
    51,232x = 70,700.16 × 28,876
  4. Step 4: Simplify right side
    51,232x = 2,041,537,820.16
  5. Step 5: Solve for x
    x = 2,041,537,820.16/51,232
  6. Step 6: Final answer
    x = 39,848.88

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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.