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Finding the Fourth Proportional to 189,810.38, 261,925.13 and 104,920.76

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Solution

The fourth proportional to 189,810.38, 261,925.13 and 104,920.76 is: 144,783.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,810.38 : 261,925.13 = 104,920.76 : x
  2. Step 2: Convert to fraction form
    189,810.38/261,925.13 = 104,920.76/x
  3. Step 3: Cross multiply
    189,810.38x = 261,925.13 × 104,920.76
  4. Step 4: Simplify right side
    189,810.38x = 27,481,383,702.70
  5. Step 5: Solve for x
    x = 27,481,383,702.70/189,810.38
  6. Step 6: Final answer
    x = 144,783.36

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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.