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Finding the Fourth Proportional to 155,912.07, 215,158.67 and 84,292.07

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Solution

The fourth proportional to 155,912.07, 215,158.67 and 84,292.07 is: 116,323.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,912.07 : 215,158.67 = 84,292.07 : x
  2. Step 2: Convert to fraction form
    155,912.07/215,158.67 = 84,292.07/x
  3. Step 3: Cross multiply
    155,912.07x = 215,158.67 × 84,292.07
  4. Step 4: Simplify right side
    155,912.07x = 18,136,169,672.75
  5. Step 5: Solve for x
    x = 18,136,169,672.75/155,912.07
  6. Step 6: Final answer
    x = 116,323.06

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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.