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Finding the Fourth Proportional to 51,409.78, 70,940.01 and 28,746.43

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Solution

The fourth proportional to 51,409.78, 70,940.01 and 28,746.43 is: 39,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,409.78 : 70,940.01 = 28,746.43 : x
  2. Step 2: Convert to fraction form
    51,409.78/70,940.01 = 28,746.43/x
  3. Step 3: Cross multiply
    51,409.78x = 70,940.01 × 28,746.43
  4. Step 4: Simplify right side
    51,409.78x = 2,039,272,031.66
  5. Step 5: Solve for x
    x = 2,039,272,031.66/51,409.78
  6. Step 6: Final answer
    x = 39,667.01

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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.