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Finding the Fourth Proportional to 128,976.80, 193,330.80 and 62,316.32

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Solution

The fourth proportional to 128,976.80, 193,330.80 and 62,316.32 is: 93,409.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976.80 : 193,330.80 = 62,316.32 : x
  2. Step 2: Convert to fraction form
    128,976.80/193,330.80 = 62,316.32/x
  3. Step 3: Cross multiply
    128,976.80x = 193,330.80 × 62,316.32
  4. Step 4: Simplify right side
    128,976.80x = 12,047,663,998.66
  5. Step 5: Solve for x
    x = 12,047,663,998.66/128,976.80
  6. Step 6: Final answer
    x = 93,409.54

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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.