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Finding the Fourth Proportional to 156,090.87, 215,405.38 and 84,470.88

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Solution

The fourth proportional to 156,090.87, 215,405.38 and 84,470.88 is: 116,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,090.87 : 215,405.38 = 84,470.88 : x
  2. Step 2: Convert to fraction form
    156,090.87/215,405.38 = 84,470.88/x
  3. Step 3: Cross multiply
    156,090.87x = 215,405.38 × 84,470.88
  4. Step 4: Simplify right side
    156,090.87x = 18,195,482,005.33
  5. Step 5: Solve for x
    x = 18,195,482,005.33/156,090.87
  6. Step 6: Final answer
    x = 116,569.80

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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.