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Finding the Fourth Proportional to 312,772.80, 469,110.60 and 88,111.20

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Solution

The fourth proportional to 312,772.80, 469,110.60 and 88,111.20 is: 132,153.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,772.80 : 469,110.60 = 88,111.20 : x
  2. Step 2: Convert to fraction form
    312,772.80/469,110.60 = 88,111.20/x
  3. Step 3: Cross multiply
    312,772.80x = 469,110.60 × 88,111.20
  4. Step 4: Simplify right side
    312,772.80x = 41,333,897,898.72
  5. Step 5: Solve for x
    x = 41,333,897,898.72/312,772.80
  6. Step 6: Final answer
    x = 132,153.11

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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.