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Finding the Fourth Proportional to 91,987.74, 126,954 and 51,703.20

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Solution

The fourth proportional to 91,987.74, 126,954 and 51,703.20 is: 71,356.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,987.74 : 126,954 = 51,703.20 : x
  2. Step 2: Convert to fraction form
    91,987.74/126,954 = 51,703.20/x
  3. Step 3: Cross multiply
    91,987.74x = 126,954 × 51,703.20
  4. Step 4: Simplify right side
    91,987.74x = 6,563,928,052.80
  5. Step 5: Solve for x
    x = 6,563,928,052.80/91,987.74
  6. Step 6: Final answer
    x = 71,356.55

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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.