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Finding the Fourth Proportional to 156,090.28, 215,405.12 and 84,470.28

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Solution

The fourth proportional to 156,090.28, 215,405.12 and 84,470.28 is: 116,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,090.28 : 215,405.12 = 84,470.28 : x
  2. Step 2: Convert to fraction form
    156,090.28/215,405.12 = 84,470.28/x
  3. Step 3: Cross multiply
    156,090.28x = 215,405.12 × 84,470.28
  4. Step 4: Simplify right side
    156,090.28x = 18,195,330,799.83
  5. Step 5: Solve for x
    x = 18,195,330,799.83/156,090.28
  6. Step 6: Final answer
    x = 116,569.28

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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.