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Finding the Fourth Proportional to 51,141, 70,575.12 and 28,785

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Solution

The fourth proportional to 51,141, 70,575.12 and 28,785 is: 39,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,141 : 70,575.12 = 28,785 : x
  2. Step 2: Convert to fraction form
    51,141/70,575.12 = 28,785/x
  3. Step 3: Cross multiply
    51,141x = 70,575.12 × 28,785
  4. Step 4: Simplify right side
    51,141x = 2,031,504,829.20
  5. Step 5: Solve for x
    x = 2,031,504,829.20/51,141
  6. Step 6: Final answer
    x = 39,723.60

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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.