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Finding the Fourth Proportional to 187,345.20, 280,920.60 and 68,955.60

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Solution

The fourth proportional to 187,345.20, 280,920.60 and 68,955.60 is: 103,397.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,345.20 : 280,920.60 = 68,955.60 : x
  2. Step 2: Convert to fraction form
    187,345.20/280,920.60 = 68,955.60/x
  3. Step 3: Cross multiply
    187,345.20x = 280,920.60 × 68,955.60
  4. Step 4: Simplify right side
    187,345.20x = 19,371,048,525.36
  5. Step 5: Solve for x
    x = 19,371,048,525.36/187,345.20
  6. Step 6: Final answer
    x = 103,397.62

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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.