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Finding the Fourth Proportional to 91,296.96, 125,506.10 and 78,503.28

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Solution

The fourth proportional to 91,296.96, 125,506.10 and 78,503.28 is: 107,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,296.96 : 125,506.10 = 78,503.28 : x
  2. Step 2: Convert to fraction form
    91,296.96/125,506.10 = 78,503.28/x
  3. Step 3: Cross multiply
    91,296.96x = 125,506.10 × 78,503.28
  4. Step 4: Simplify right side
    91,296.96x = 9,852,640,510.01
  5. Step 5: Solve for x
    x = 9,852,640,510.01/91,296.96
  6. Step 6: Final answer
    x = 107,918.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.