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Finding the Fourth Proportional to 191,409.80, 286,903.28 and 79,028.06

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Solution

The fourth proportional to 191,409.80, 286,903.28 and 79,028.06 is: 118,454.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,409.80 : 286,903.28 = 79,028.06 : x
  2. Step 2: Convert to fraction form
    191,409.80/286,903.28 = 79,028.06/x
  3. Step 3: Cross multiply
    191,409.80x = 286,903.28 × 79,028.06
  4. Step 4: Simplify right side
    191,409.80x = 22,673,409,626.04
  5. Step 5: Solve for x
    x = 22,673,409,626.04/191,409.80
  6. Step 6: Final answer
    x = 118,454.80

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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.