Home / 261,098.08-390,982.44-172,081.72

Finding the Fourth Proportional to 261,098.08, 390,982.44 and 172,081.72

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Solution

The fourth proportional to 261,098.08, 390,982.44 and 172,081.72 is: 257,684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,098.08 : 390,982.44 = 172,081.72 : x
  2. Step 2: Convert to fraction form
    261,098.08/390,982.44 = 172,081.72/x
  3. Step 3: Cross multiply
    261,098.08x = 390,982.44 × 172,081.72
  4. Step 4: Simplify right side
    261,098.08x = 67,280,929,699.76
  5. Step 5: Solve for x
    x = 67,280,929,699.76/261,098.08
  6. Step 6: Final answer
    x = 257,684.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.