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Finding the Fourth Proportional to 108,751.90, 150,130.38 and 72,928.84

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Solution

The fourth proportional to 108,751.90, 150,130.38 and 72,928.84 is: 100,677.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,751.90 : 150,130.38 = 72,928.84 : x
  2. Step 2: Convert to fraction form
    108,751.90/150,130.38 = 72,928.84/x
  3. Step 3: Cross multiply
    108,751.90x = 150,130.38 × 72,928.84
  4. Step 4: Simplify right side
    108,751.90x = 10,948,834,462.16
  5. Step 5: Solve for x
    x = 10,948,834,462.16/108,751.90
  6. Step 6: Final answer
    x = 100,677.18

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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.