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Finding the Fourth Proportional to 70,763.20, 106,114.08 and 21,503.68

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Solution

The fourth proportional to 70,763.20, 106,114.08 and 21,503.68 is: 32,246.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,763.20 : 106,114.08 = 21,503.68 : x
  2. Step 2: Convert to fraction form
    70,763.20/106,114.08 = 21,503.68/x
  3. Step 3: Cross multiply
    70,763.20x = 106,114.08 × 21,503.68
  4. Step 4: Simplify right side
    70,763.20x = 2,281,843,219.81
  5. Step 5: Solve for x
    x = 2,281,843,219.81/70,763.20
  6. Step 6: Final answer
    x = 32,246.18

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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.