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Finding the Fourth Proportional to 155,796.96, 215,012.11 and 86,896.21

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Solution

The fourth proportional to 155,796.96, 215,012.11 and 86,896.21 is: 119,923.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,796.96 : 215,012.11 = 86,896.21 : x
  2. Step 2: Convert to fraction form
    155,796.96/215,012.11 = 86,896.21/x
  3. Step 3: Cross multiply
    155,796.96x = 215,012.11 × 86,896.21
  4. Step 4: Simplify right side
    155,796.96x = 18,683,737,518.81
  5. Step 5: Solve for x
    x = 18,683,737,518.81/155,796.96
  6. Step 6: Final answer
    x = 119,923.63

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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.