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Finding the Fourth Proportional to 91,712, 126,562.56 and 54,009.44

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Solution

The fourth proportional to 91,712, 126,562.56 and 54,009.44 is: 74,533.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,712 : 126,562.56 = 54,009.44 : x
  2. Step 2: Convert to fraction form
    91,712/126,562.56 = 54,009.44/x
  3. Step 3: Cross multiply
    91,712x = 126,562.56 × 54,009.44
  4. Step 4: Simplify right side
    91,712x = 6,835,572,990.57
  5. Step 5: Solve for x
    x = 6,835,572,990.57/91,712
  6. Step 6: Final answer
    x = 74,533.03

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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.