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Finding the Fourth Proportional to 125,157, 172,716.66 and 74,856

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Solution

The fourth proportional to 125,157, 172,716.66 and 74,856 is: 103,301.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,157 : 172,716.66 = 74,856 : x
  2. Step 2: Convert to fraction form
    125,157/172,716.66 = 74,856/x
  3. Step 3: Cross multiply
    125,157x = 172,716.66 × 74,856
  4. Step 4: Simplify right side
    125,157x = 12,928,878,300.96
  5. Step 5: Solve for x
    x = 12,928,878,300.96/125,157
  6. Step 6: Final answer
    x = 103,301.28

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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.