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Finding the Fourth Proportional to 191,108.96, 286,788.32 and 72,781.44

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Solution

The fourth proportional to 191,108.96, 286,788.32 and 72,781.44 is: 109,219.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,108.96 : 286,788.32 = 72,781.44 : x
  2. Step 2: Convert to fraction form
    191,108.96/286,788.32 = 72,781.44/x
  3. Step 3: Cross multiply
    191,108.96x = 286,788.32 × 72,781.44
  4. Step 4: Simplify right side
    191,108.96x = 20,872,866,904.78
  5. Step 5: Solve for x
    x = 20,872,866,904.78/191,108.96
  6. Step 6: Final answer
    x = 109,219.72

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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.