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Finding the Fourth Proportional to 191,135.32, 286,669.45 and 72,813.76

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Solution

The fourth proportional to 191,135.32, 286,669.45 and 72,813.76 is: 109,207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,135.32 : 286,669.45 = 72,813.76 : x
  2. Step 2: Convert to fraction form
    191,135.32/286,669.45 = 72,813.76/x
  3. Step 3: Cross multiply
    191,135.32x = 286,669.45 × 72,813.76
  4. Step 4: Simplify right side
    191,135.32x = 20,873,480,531.63
  5. Step 5: Solve for x
    x = 20,873,480,531.63/191,135.32
  6. Step 6: Final answer
    x = 109,207.87

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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.