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Finding the Fourth Proportional to 125,214, 172,795.32 and 72,222

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Solution

The fourth proportional to 125,214, 172,795.32 and 72,222 is: 99,666.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,214 : 172,795.32 = 72,222 : x
  2. Step 2: Convert to fraction form
    125,214/172,795.32 = 72,222/x
  3. Step 3: Cross multiply
    125,214x = 172,795.32 × 72,222
  4. Step 4: Simplify right side
    125,214x = 12,479,623,601.04
  5. Step 5: Solve for x
    x = 12,479,623,601.04/125,214
  6. Step 6: Final answer
    x = 99,666.36

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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.