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Finding the Fourth Proportional to 515,170.80, 772,761.60 and 141,193.80

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Solution

The fourth proportional to 515,170.80, 772,761.60 and 141,193.80 is: 211,792.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,170.80 : 772,761.60 = 141,193.80 : x
  2. Step 2: Convert to fraction form
    515,170.80/772,761.60 = 141,193.80/x
  3. Step 3: Cross multiply
    515,170.80x = 772,761.60 × 141,193.80
  4. Step 4: Simplify right side
    515,170.80x = 109,109,146,798.08
  5. Step 5: Solve for x
    x = 109,109,146,798.08/515,170.80
  6. Step 6: Final answer
    x = 211,792.18

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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.