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Finding the Fourth Proportional to 51,370.93, 70,891.64 and 28,709.90

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Solution

The fourth proportional to 51,370.93, 70,891.64 and 28,709.90 is: 39,619.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,370.93 : 70,891.64 = 28,709.90 : x
  2. Step 2: Convert to fraction form
    51,370.93/70,891.64 = 28,709.90/x
  3. Step 3: Cross multiply
    51,370.93x = 70,891.64 × 28,709.90
  4. Step 4: Simplify right side
    51,370.93x = 2,035,291,397.23
  5. Step 5: Solve for x
    x = 2,035,291,397.23/51,370.93
  6. Step 6: Final answer
    x = 39,619.52

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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.