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Finding the Fourth Proportional to 200,111.15, 300,211.50 and 105,385.93

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Solution

The fourth proportional to 200,111.15, 300,211.50 and 105,385.93 is: 158,102.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,111.15 : 300,211.50 = 105,385.93 : x
  2. Step 2: Convert to fraction form
    200,111.15/300,211.50 = 105,385.93/x
  3. Step 3: Cross multiply
    200,111.15x = 300,211.50 × 105,385.93
  4. Step 4: Simplify right side
    200,111.15x = 31,638,068,124.20
  5. Step 5: Solve for x
    x = 31,638,068,124.20/200,111.15
  6. Step 6: Final answer
    x = 158,102.48

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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.