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Finding the Fourth Proportional to 51,053.68, 70,451.94 and 28,391.50

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Solution

The fourth proportional to 51,053.68, 70,451.94 and 28,391.50 is: 39,179.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,053.68 : 70,451.94 = 28,391.50 : x
  2. Step 2: Convert to fraction form
    51,053.68/70,451.94 = 28,391.50/x
  3. Step 3: Cross multiply
    51,053.68x = 70,451.94 × 28,391.50
  4. Step 4: Simplify right side
    51,053.68x = 2,000,236,254.51
  5. Step 5: Solve for x
    x = 2,000,236,254.51/51,053.68
  6. Step 6: Final answer
    x = 39,179.08

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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.