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Finding the Fourth Proportional to 51,309.68, 70,808.65 and 28,647.77

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Solution

The fourth proportional to 51,309.68, 70,808.65 and 28,647.77 is: 39,534.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,309.68 : 70,808.65 = 28,647.77 : x
  2. Step 2: Convert to fraction form
    51,309.68/70,808.65 = 28,647.77/x
  3. Step 3: Cross multiply
    51,309.68x = 70,808.65 × 28,647.77
  4. Step 4: Simplify right side
    51,309.68x = 2,028,509,493.55
  5. Step 5: Solve for x
    x = 2,028,509,493.55/51,309.68
  6. Step 6: Final answer
    x = 39,534.64

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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.