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Finding the Fourth Proportional to 125,163.42, 172,699.62 and 71,465.90

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Solution

The fourth proportional to 125,163.42, 172,699.62 and 71,465.90 is: 98,608.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,163.42 : 172,699.62 = 71,465.90 : x
  2. Step 2: Convert to fraction form
    125,163.42/172,699.62 = 71,465.90/x
  3. Step 3: Cross multiply
    125,163.42x = 172,699.62 × 71,465.90
  4. Step 4: Simplify right side
    125,163.42x = 12,342,133,772.96
  5. Step 5: Solve for x
    x = 12,342,133,772.96/125,163.42
  6. Step 6: Final answer
    x = 98,608.15

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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.