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Finding the Fourth Proportional to 70,998.42, 106,415.88 and 28,832.20

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Solution

The fourth proportional to 70,998.42, 106,415.88 and 28,832.20 is: 43,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,998.42 : 106,415.88 = 28,832.20 : x
  2. Step 2: Convert to fraction form
    70,998.42/106,415.88 = 28,832.20/x
  3. Step 3: Cross multiply
    70,998.42x = 106,415.88 × 28,832.20
  4. Step 4: Simplify right side
    70,998.42x = 3,068,204,159.76
  5. Step 5: Solve for x
    x = 3,068,204,159.76/70,998.42
  6. Step 6: Final answer
    x = 43,215.10

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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.