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Finding the Fourth Proportional to 156,090.66, 215,405.64 and 84,470.66

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Solution

The fourth proportional to 156,090.66, 215,405.64 and 84,470.66 is: 116,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,090.66 : 215,405.64 = 84,470.66 : x
  2. Step 2: Convert to fraction form
    156,090.66/215,405.64 = 84,470.66/x
  3. Step 3: Cross multiply
    156,090.66x = 215,405.64 × 84,470.66
  4. Step 4: Simplify right side
    156,090.66x = 18,195,456,578.52
  5. Step 5: Solve for x
    x = 18,195,456,578.52/156,090.66
  6. Step 6: Final answer
    x = 116,569.80

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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.