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Finding the Fourth Proportional to 91,958.46, 126,914.40 and 56,140.80

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Solution

The fourth proportional to 91,958.46, 126,914.40 and 56,140.80 is: 77,481.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,958.46 : 126,914.40 = 56,140.80 : x
  2. Step 2: Convert to fraction form
    91,958.46/126,914.40 = 56,140.80/x
  3. Step 3: Cross multiply
    91,958.46x = 126,914.40 × 56,140.80
  4. Step 4: Simplify right side
    91,958.46x = 7,125,075,947.52
  5. Step 5: Solve for x
    x = 7,125,075,947.52/91,958.46
  6. Step 6: Final answer
    x = 77,481.46

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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.