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Finding the Fourth Proportional to 81,214.40, 121,821.60 and 22,059.20

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Solution

The fourth proportional to 81,214.40, 121,821.60 and 22,059.20 is: 33,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,214.40 : 121,821.60 = 22,059.20 : x
  2. Step 2: Convert to fraction form
    81,214.40/121,821.60 = 22,059.20/x
  3. Step 3: Cross multiply
    81,214.40x = 121,821.60 × 22,059.20
  4. Step 4: Simplify right side
    81,214.40x = 2,687,287,038.72
  5. Step 5: Solve for x
    x = 2,687,287,038.72/81,214.40
  6. Step 6: Final answer
    x = 33,088.80

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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.