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Finding the Fourth Proportional to 343,876.15, 515,817.60 and 103,991.95

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Solution

The fourth proportional to 343,876.15, 515,817.60 and 103,991.95 is: 155,988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,876.15 : 515,817.60 = 103,991.95 : x
  2. Step 2: Convert to fraction form
    343,876.15/515,817.60 = 103,991.95/x
  3. Step 3: Cross multiply
    343,876.15x = 515,817.60 × 103,991.95
  4. Step 4: Simplify right side
    343,876.15x = 53,640,878,068.32
  5. Step 5: Solve for x
    x = 53,640,878,068.32/343,876.15
  6. Step 6: Final answer
    x = 155,988.95

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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.