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Finding the Fourth Proportional to 45,352.40, 68,028.60 and 21,981.20

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Solution

The fourth proportional to 45,352.40, 68,028.60 and 21,981.20 is: 32,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,352.40 : 68,028.60 = 21,981.20 : x
  2. Step 2: Convert to fraction form
    45,352.40/68,028.60 = 21,981.20/x
  3. Step 3: Cross multiply
    45,352.40x = 68,028.60 × 21,981.20
  4. Step 4: Simplify right side
    45,352.40x = 1,495,350,262.32
  5. Step 5: Solve for x
    x = 1,495,350,262.32/45,352.40
  6. Step 6: Final answer
    x = 32,971.80

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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.