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Finding the Fourth Proportional to 163,687.92, 245,427 and 78,263.52

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Solution

The fourth proportional to 163,687.92, 245,427 and 78,263.52 is: 117,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,687.92 : 245,427 = 78,263.52 : x
  2. Step 2: Convert to fraction form
    163,687.92/245,427 = 78,263.52/x
  3. Step 3: Cross multiply
    163,687.92x = 245,427 × 78,263.52
  4. Step 4: Simplify right side
    163,687.92x = 19,207,980,923.04
  5. Step 5: Solve for x
    x = 19,207,980,923.04/163,687.92
  6. Step 6: Final answer
    x = 117,345.13

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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.