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Finding the Fourth Proportional to 156,201.57, 215,557.86 and 84,581.80

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Solution

The fourth proportional to 156,201.57, 215,557.86 and 84,581.80 is: 116,722.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,201.57 : 215,557.86 = 84,581.80 : x
  2. Step 2: Convert to fraction form
    156,201.57/215,557.86 = 84,581.80/x
  3. Step 3: Cross multiply
    156,201.57x = 215,557.86 × 84,581.80
  4. Step 4: Simplify right side
    156,201.57x = 18,232,271,802.95
  5. Step 5: Solve for x
    x = 18,232,271,802.95/156,201.57
  6. Step 6: Final answer
    x = 116,722.72

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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.