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Finding the Fourth Proportional to 72,988.48, 100,694.50 and 51,509.41

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Solution

The fourth proportional to 72,988.48, 100,694.50 and 51,509.41 is: 71,062.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.48 : 100,694.50 = 51,509.41 : x
  2. Step 2: Convert to fraction form
    72,988.48/100,694.50 = 51,509.41/x
  3. Step 3: Cross multiply
    72,988.48x = 100,694.50 × 51,509.41
  4. Step 4: Simplify right side
    72,988.48x = 5,186,714,285.25
  5. Step 5: Solve for x
    x = 5,186,714,285.25/72,988.48
  6. Step 6: Final answer
    x = 71,062.09

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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.