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Finding the Fourth Proportional to 189,486.81, 261,492.31 and 104,603.88

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Solution

The fourth proportional to 189,486.81, 261,492.31 and 104,603.88 is: 144,353.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,486.81 : 261,492.31 = 104,603.88 : x
  2. Step 2: Convert to fraction form
    189,486.81/261,492.31 = 104,603.88/x
  3. Step 3: Cross multiply
    189,486.81x = 261,492.31 × 104,603.88
  4. Step 4: Simplify right side
    189,486.81x = 27,353,110,216.16
  5. Step 5: Solve for x
    x = 27,353,110,216.16/189,486.81
  6. Step 6: Final answer
    x = 144,353.64

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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.