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Finding the Fourth Proportional to 191,080.18, 286,623.11 and 72,758.08

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Solution

The fourth proportional to 191,080.18, 286,623.11 and 72,758.08 is: 109,138.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,080.18 : 286,623.11 = 72,758.08 : x
  2. Step 2: Convert to fraction form
    191,080.18/286,623.11 = 72,758.08/x
  3. Step 3: Cross multiply
    191,080.18x = 286,623.11 × 72,758.08
  4. Step 4: Simplify right side
    191,080.18x = 20,854,147,167.23
  5. Step 5: Solve for x
    x = 20,854,147,167.23/191,080.18
  6. Step 6: Final answer
    x = 109,138.20

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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.