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Finding the Fourth Proportional to 186,709.05, 280,112.58 and 72,858.69

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Solution

The fourth proportional to 186,709.05, 280,112.58 and 72,858.69 is: 109,307.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,709.05 : 280,112.58 = 72,858.69 : x
  2. Step 2: Convert to fraction form
    186,709.05/280,112.58 = 72,858.69/x
  3. Step 3: Cross multiply
    186,709.05x = 280,112.58 × 72,858.69
  4. Step 4: Simplify right side
    186,709.05x = 20,408,635,631.32
  5. Step 5: Solve for x
    x = 20,408,635,631.32/186,709.05
  6. Step 6: Final answer
    x = 109,307.16

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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.