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Finding the Fourth Proportional to 91,400.84, 126,147.42 and 55,602.08

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Solution

The fourth proportional to 91,400.84, 126,147.42 and 55,602.08 is: 76,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,400.84 : 126,147.42 = 55,602.08 : x
  2. Step 2: Convert to fraction form
    91,400.84/126,147.42 = 55,602.08/x
  3. Step 3: Cross multiply
    91,400.84x = 126,147.42 × 55,602.08
  4. Step 4: Simplify right side
    91,400.84x = 7,014,058,938.63
  5. Step 5: Solve for x
    x = 7,014,058,938.63/91,400.84
  6. Step 6: Final answer
    x = 76,739.55

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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.