Home / 109,207.76-150,656.32-78,945.12

Finding the Fourth Proportional to 109,207.76, 150,656.32 and 78,945.12

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Solution

The fourth proportional to 109,207.76, 150,656.32 and 78,945.12 is: 108,907.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,207.76 : 150,656.32 = 78,945.12 : x
  2. Step 2: Convert to fraction form
    109,207.76/150,656.32 = 78,945.12/x
  3. Step 3: Cross multiply
    109,207.76x = 150,656.32 × 78,945.12
  4. Step 4: Simplify right side
    109,207.76x = 11,893,581,261.16
  5. Step 5: Solve for x
    x = 11,893,581,261.16/109,207.76
  6. Step 6: Final answer
    x = 108,907.84

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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.