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Finding the Fourth Proportional to 124,220.67, 171,400.91 and 78,906.03

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Solution

The fourth proportional to 124,220.67, 171,400.91 and 78,906.03 is: 108,875.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,220.67 : 171,400.91 = 78,906.03 : x
  2. Step 2: Convert to fraction form
    124,220.67/171,400.91 = 78,906.03/x
  3. Step 3: Cross multiply
    124,220.67x = 171,400.91 × 78,906.03
  4. Step 4: Simplify right side
    124,220.67x = 13,524,564,951.96
  5. Step 5: Solve for x
    x = 13,524,564,951.96/124,220.67
  6. Step 6: Final answer
    x = 108,875.32

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1.5x scale

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.