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Finding the Fourth Proportional to 124,740, 172,144.85 and 68,155.02

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Solution

The fourth proportional to 124,740, 172,144.85 and 68,155.02 is: 94,055.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,740 : 172,144.85 = 68,155.02 : x
  2. Step 2: Convert to fraction form
    124,740/172,144.85 = 68,155.02/x
  3. Step 3: Cross multiply
    124,740x = 172,144.85 × 68,155.02
  4. Step 4: Simplify right side
    124,740x = 11,732,535,353.87
  5. Step 5: Solve for x
    x = 11,732,535,353.87/124,740
  6. Step 6: Final answer
    x = 94,055.92

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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.