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Finding the Fourth Proportional to 191,428.38, 287,206.51 and 84,797.85

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Solution

The fourth proportional to 191,428.38, 287,206.51 and 84,797.85 is: 127,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,428.38 : 287,206.51 = 84,797.85 : x
  2. Step 2: Convert to fraction form
    191,428.38/287,206.51 = 84,797.85/x
  3. Step 3: Cross multiply
    191,428.38x = 287,206.51 × 84,797.85
  4. Step 4: Simplify right side
    191,428.38x = 24,354,494,554.00
  5. Step 5: Solve for x
    x = 24,354,494,554.00/191,428.38
  6. Step 6: Final answer
    x = 127,225.10

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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.