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Finding the Fourth Proportional to 189,171.88, 261,053.70 and 103,131.76

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Solution

The fourth proportional to 189,171.88, 261,053.70 and 103,131.76 is: 142,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,171.88 : 261,053.70 = 103,131.76 : x
  2. Step 2: Convert to fraction form
    189,171.88/261,053.70 = 103,131.76/x
  3. Step 3: Cross multiply
    189,171.88x = 261,053.70 × 103,131.76
  4. Step 4: Simplify right side
    189,171.88x = 26,922,927,535.51
  5. Step 5: Solve for x
    x = 26,922,927,535.51/189,171.88
  6. Step 6: Final answer
    x = 142,319.92

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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.