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Finding the Fourth Proportional to 186,316.09, 279,478.72 and 67,987.40

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Solution

The fourth proportional to 186,316.09, 279,478.72 and 67,987.40 is: 101,982.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,316.09 : 279,478.72 = 67,987.40 : x
  2. Step 2: Convert to fraction form
    186,316.09/279,478.72 = 67,987.40/x
  3. Step 3: Cross multiply
    186,316.09x = 279,478.72 × 67,987.40
  4. Step 4: Simplify right side
    186,316.09x = 19,001,029,960.77
  5. Step 5: Solve for x
    x = 19,001,029,960.77/186,316.09
  6. Step 6: Final answer
    x = 101,982.77

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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.