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Finding the Fourth Proportional to 220,071.70, 330,216.90 and 86,956.30

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Solution

The fourth proportional to 220,071.70, 330,216.90 and 86,956.30 is: 130,477.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,071.70 : 330,216.90 = 86,956.30 : x
  2. Step 2: Convert to fraction form
    220,071.70/330,216.90 = 86,956.30/x
  3. Step 3: Cross multiply
    220,071.70x = 330,216.90 × 86,956.30
  4. Step 4: Simplify right side
    220,071.70x = 28,714,439,821.47
  5. Step 5: Solve for x
    x = 28,714,439,821.47/220,071.70
  6. Step 6: Final answer
    x = 130,477.66

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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.