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Finding the Fourth Proportional to 70,820.80, 106,231.20 and 21,566.40

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Solution

The fourth proportional to 70,820.80, 106,231.20 and 21,566.40 is: 32,349.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,820.80 : 106,231.20 = 21,566.40 : x
  2. Step 2: Convert to fraction form
    70,820.80/106,231.20 = 21,566.40/x
  3. Step 3: Cross multiply
    70,820.80x = 106,231.20 × 21,566.40
  4. Step 4: Simplify right side
    70,820.80x = 2,291,024,551.68
  5. Step 5: Solve for x
    x = 2,291,024,551.68/70,820.80
  6. Step 6: Final answer
    x = 32,349.60

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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.