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Finding the Fourth Proportional to 155,761.08, 214,945.16 and 98,431.04

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Solution

The fourth proportional to 155,761.08, 214,945.16 and 98,431.04 is: 135,831.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,761.08 : 214,945.16 = 98,431.04 : x
  2. Step 2: Convert to fraction form
    155,761.08/214,945.16 = 98,431.04/x
  3. Step 3: Cross multiply
    155,761.08x = 214,945.16 × 98,431.04
  4. Step 4: Simplify right side
    155,761.08x = 21,157,275,641.77
  5. Step 5: Solve for x
    x = 21,157,275,641.77/155,761.08
  6. Step 6: Final answer
    x = 135,831.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.