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Finding the Fourth Proportional to 515,125.34, 772,679.80 and 141,148.34

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Solution

The fourth proportional to 515,125.34, 772,679.80 and 141,148.34 is: 211,720.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,125.34 : 772,679.80 = 141,148.34 : x
  2. Step 2: Convert to fraction form
    515,125.34/772,679.80 = 141,148.34/x
  3. Step 3: Cross multiply
    515,125.34x = 772,679.80 × 141,148.34
  4. Step 4: Simplify right side
    515,125.34x = 109,062,471,121.53
  5. Step 5: Solve for x
    x = 109,062,471,121.53/515,125.34
  6. Step 6: Final answer
    x = 211,720.26

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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.