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Finding the Fourth Proportional to 100,991.20, 151,486.80 and 29,916.40

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Solution

The fourth proportional to 100,991.20, 151,486.80 and 29,916.40 is: 44,874.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,991.20 : 151,486.80 = 29,916.40 : x
  2. Step 2: Convert to fraction form
    100,991.20/151,486.80 = 29,916.40/x
  3. Step 3: Cross multiply
    100,991.20x = 151,486.80 × 29,916.40
  4. Step 4: Simplify right side
    100,991.20x = 4,531,939,703.52
  5. Step 5: Solve for x
    x = 4,531,939,703.52/100,991.20
  6. Step 6: Final answer
    x = 44,874.60

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1.5x scale

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.