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Finding the Fourth Proportional to 261,028.10, 391,214.10 and 127,621.10

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Solution

The fourth proportional to 261,028.10, 391,214.10 and 127,621.10 is: 191,271.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,028.10 : 391,214.10 = 127,621.10 : x
  2. Step 2: Convert to fraction form
    261,028.10/391,214.10 = 127,621.10/x
  3. Step 3: Cross multiply
    261,028.10x = 391,214.10 × 127,621.10
  4. Step 4: Simplify right side
    261,028.10x = 49,927,173,777.51
  5. Step 5: Solve for x
    x = 49,927,173,777.51/261,028.10
  6. Step 6: Final answer
    x = 191,271.26

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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.