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Finding the Fourth Proportional to 108,376.92, 149,357.52 and 78,109.92

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Solution

The fourth proportional to 108,376.92, 149,357.52 and 78,109.92 is: 107,645.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,376.92 : 149,357.52 = 78,109.92 : x
  2. Step 2: Convert to fraction form
    108,376.92/149,357.52 = 78,109.92/x
  3. Step 3: Cross multiply
    108,376.92x = 149,357.52 × 78,109.92
  4. Step 4: Simplify right side
    108,376.92x = 11,666,303,938.60
  5. Step 5: Solve for x
    x = 11,666,303,938.60/108,376.92
  6. Step 6: Final answer
    x = 107,645.65

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1.5x scale

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.