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Finding the Fourth Proportional to 124,718.80, 187,078.20 and 78,062.80

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Solution

The fourth proportional to 124,718.80, 187,078.20 and 78,062.80 is: 117,094.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,718.80 : 187,078.20 = 78,062.80 : x
  2. Step 2: Convert to fraction form
    124,718.80/187,078.20 = 78,062.80/x
  3. Step 3: Cross multiply
    124,718.80x = 187,078.20 × 78,062.80
  4. Step 4: Simplify right side
    124,718.80x = 14,603,848,110.96
  5. Step 5: Solve for x
    x = 14,603,848,110.96/124,718.80
  6. Step 6: Final answer
    x = 117,094.20

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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.