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Finding the Fourth Proportional to 156,090.74, 215,405.88 and 84,470.76

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Solution

The fourth proportional to 156,090.74, 215,405.88 and 84,470.76 is: 116,570.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,090.74 : 215,405.88 = 84,470.76 : x
  2. Step 2: Convert to fraction form
    156,090.74/215,405.88 = 84,470.76/x
  3. Step 3: Cross multiply
    156,090.74x = 215,405.88 × 84,470.76
  4. Step 4: Simplify right side
    156,090.74x = 18,195,498,392.07
  5. Step 5: Solve for x
    x = 18,195,498,392.07/156,090.74
  6. Step 6: Final answer
    x = 116,570.01

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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.