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Finding the Fourth Proportional to 191,305.20, 287,087.40 and 124,582.80

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Solution

The fourth proportional to 191,305.20, 287,087.40 and 124,582.80 is: 186,958.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,305.20 : 287,087.40 = 124,582.80 : x
  2. Step 2: Convert to fraction form
    191,305.20/287,087.40 = 124,582.80/x
  3. Step 3: Cross multiply
    191,305.20x = 287,087.40 × 124,582.80
  4. Step 4: Simplify right side
    191,305.20x = 35,766,152,136.72
  5. Step 5: Solve for x
    x = 35,766,152,136.72/191,305.20
  6. Step 6: Final answer
    x = 186,958.60

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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.