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Finding the Fourth Proportional to 91,702.80, 126,555.96 and 51,419.22

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Solution

The fourth proportional to 91,702.80, 126,555.96 and 51,419.22 is: 70,961.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,702.80 : 126,555.96 = 51,419.22 : x
  2. Step 2: Convert to fraction form
    91,702.80/126,555.96 = 51,419.22/x
  3. Step 3: Cross multiply
    91,702.80x = 126,555.96 × 51,419.22
  4. Step 4: Simplify right side
    91,702.80x = 6,507,408,749.55
  5. Step 5: Solve for x
    x = 6,507,408,749.55/91,702.80
  6. Step 6: Final answer
    x = 70,961.94

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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.