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Finding the Fourth Proportional to 191,015.81, 286,580.95 and 77,104.97

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Solution

The fourth proportional to 191,015.81, 286,580.95 and 77,104.97 is: 115,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,015.81 : 286,580.95 = 77,104.97 : x
  2. Step 2: Convert to fraction form
    191,015.81/286,580.95 = 77,104.97/x
  3. Step 3: Cross multiply
    191,015.81x = 286,580.95 × 77,104.97
  4. Step 4: Simplify right side
    191,015.81x = 22,096,813,926.65
  5. Step 5: Solve for x
    x = 22,096,813,926.65/191,015.81
  6. Step 6: Final answer
    x = 115,680.55

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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.