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Finding the Fourth Proportional to 143,765.94, 215,320.86 and 126,947.91

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Solution

The fourth proportional to 143,765.94, 215,320.86 and 126,947.91 is: 190,132.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,765.94 : 215,320.86 = 126,947.91 : x
  2. Step 2: Convert to fraction form
    143,765.94/215,320.86 = 126,947.91/x
  3. Step 3: Cross multiply
    143,765.94x = 215,320.86 × 126,947.91
  4. Step 4: Simplify right side
    143,765.94x = 27,334,533,156.40
  5. Step 5: Solve for x
    x = 27,334,533,156.40/143,765.94
  6. Step 6: Final answer
    x = 190,132.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.