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Finding the Fourth Proportional to 186,988.59, 280,316.39 and 68,632.47

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Solution

The fourth proportional to 186,988.59, 280,316.39 and 68,632.47 is: 102,887.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,988.59 : 280,316.39 = 68,632.47 : x
  2. Step 2: Convert to fraction form
    186,988.59/280,316.39 = 68,632.47/x
  3. Step 3: Cross multiply
    186,988.59x = 280,316.39 × 68,632.47
  4. Step 4: Simplify right side
    186,988.59x = 19,238,805,884.02
  5. Step 5: Solve for x
    x = 19,238,805,884.02/186,988.59
  6. Step 6: Final answer
    x = 102,887.59

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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.