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Finding the Fourth Proportional to 136,802.76, 188,790.92 and 85,817.56

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Solution

The fourth proportional to 136,802.76, 188,790.92 and 85,817.56 is: 118,430.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,802.76 : 188,790.92 = 85,817.56 : x
  2. Step 2: Convert to fraction form
    136,802.76/188,790.92 = 85,817.56/x
  3. Step 3: Cross multiply
    136,802.76x = 188,790.92 × 85,817.56
  4. Step 4: Simplify right side
    136,802.76x = 16,201,576,104.56
  5. Step 5: Solve for x
    x = 16,201,576,104.56/136,802.76
  6. Step 6: Final answer
    x = 118,430.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.