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Finding the Fourth Proportional to 70,967.22, 106,450.80 and 28,870.20

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Solution

The fourth proportional to 70,967.22, 106,450.80 and 28,870.20 is: 43,305.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,967.22 : 106,450.80 = 28,870.20 : x
  2. Step 2: Convert to fraction form
    70,967.22/106,450.80 = 28,870.20/x
  3. Step 3: Cross multiply
    70,967.22x = 106,450.80 × 28,870.20
  4. Step 4: Simplify right side
    70,967.22x = 3,073,255,886.16
  5. Step 5: Solve for x
    x = 3,073,255,886.16/70,967.22
  6. Step 6: Final answer
    x = 43,305.29

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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.