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Finding the Fourth Proportional to 156,426.66, 215,868.65 and 84,806.06

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Solution

The fourth proportional to 156,426.66, 215,868.65 and 84,806.06 is: 117,032.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,426.66 : 215,868.65 = 84,806.06 : x
  2. Step 2: Convert to fraction form
    156,426.66/215,868.65 = 84,806.06/x
  3. Step 3: Cross multiply
    156,426.66x = 215,868.65 × 84,806.06
  4. Step 4: Simplify right side
    156,426.66x = 18,306,968,180.65
  5. Step 5: Solve for x
    x = 18,306,968,180.65/156,426.66
  6. Step 6: Final answer
    x = 117,032.28

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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.