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Finding the Fourth Proportional to 125,097.94, 172,649.64 and 71,390.69

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Solution

The fourth proportional to 125,097.94, 172,649.64 and 71,390.69 is: 98,527.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,097.94 : 172,649.64 = 71,390.69 : x
  2. Step 2: Convert to fraction form
    125,097.94/172,649.64 = 71,390.69/x
  3. Step 3: Cross multiply
    125,097.94x = 172,649.64 × 71,390.69
  4. Step 4: Simplify right side
    125,097.94x = 12,325,576,927.85
  5. Step 5: Solve for x
    x = 12,325,576,927.85/125,097.94
  6. Step 6: Final answer
    x = 98,527.42

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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.