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Finding the Fourth Proportional to 189,139.62, 261,009.90 and 104,254.86

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Solution

The fourth proportional to 189,139.62, 261,009.90 and 104,254.86 is: 143,870.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,139.62 : 261,009.90 = 104,254.86 : x
  2. Step 2: Convert to fraction form
    189,139.62/261,009.90 = 104,254.86/x
  3. Step 3: Cross multiply
    189,139.62x = 261,009.90 × 104,254.86
  4. Step 4: Simplify right side
    189,139.62x = 27,211,550,583.11
  5. Step 5: Solve for x
    x = 27,211,550,583.11/189,139.62
  6. Step 6: Final answer
    x = 143,870.18

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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.