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Finding the Fourth Proportional to 186,316.32, 279,516 and 67,987.68

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Solution

The fourth proportional to 186,316.32, 279,516 and 67,987.68 is: 101,996.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,316.32 : 279,516 = 67,987.68 : x
  2. Step 2: Convert to fraction form
    186,316.32/279,516 = 67,987.68/x
  3. Step 3: Cross multiply
    186,316.32x = 279,516 × 67,987.68
  4. Step 4: Simplify right side
    186,316.32x = 19,003,644,362.88
  5. Step 5: Solve for x
    x = 19,003,644,362.88/186,316.32
  6. Step 6: Final answer
    x = 101,996.67

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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.