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Finding the Fourth Proportional to 215,000.40, 322,500.60 and 108,712.20

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Solution

The fourth proportional to 215,000.40, 322,500.60 and 108,712.20 is: 163,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,000.40 : 322,500.60 = 108,712.20 : x
  2. Step 2: Convert to fraction form
    215,000.40/322,500.60 = 108,712.20/x
  3. Step 3: Cross multiply
    215,000.40x = 322,500.60 × 108,712.20
  4. Step 4: Simplify right side
    215,000.40x = 35,059,749,727.32
  5. Step 5: Solve for x
    x = 35,059,749,727.32/215,000.40
  6. Step 6: Final answer
    x = 163,068.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.