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Finding the Fourth Proportional to 191,915.20, 287,764.80 and 73,590.40

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Solution

The fourth proportional to 191,915.20, 287,764.80 and 73,590.40 is: 110,344.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,915.20 : 287,764.80 = 73,590.40 : x
  2. Step 2: Convert to fraction form
    191,915.20/287,764.80 = 73,590.40/x
  3. Step 3: Cross multiply
    191,915.20x = 287,764.80 × 73,590.40
  4. Step 4: Simplify right side
    191,915.20x = 21,176,726,737.92
  5. Step 5: Solve for x
    x = 21,176,726,737.92/191,915.20
  6. Step 6: Final answer
    x = 110,344.19

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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.