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Finding the Fourth Proportional to 40,981.60, 61,472.40 and 20,202.40

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Solution

The fourth proportional to 40,981.60, 61,472.40 and 20,202.40 is: 30,303.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,981.60 : 61,472.40 = 20,202.40 : x
  2. Step 2: Convert to fraction form
    40,981.60/61,472.40 = 20,202.40/x
  3. Step 3: Cross multiply
    40,981.60x = 61,472.40 × 20,202.40
  4. Step 4: Simplify right side
    40,981.60x = 1,241,890,013.76
  5. Step 5: Solve for x
    x = 1,241,890,013.76/40,981.60
  6. Step 6: Final answer
    x = 30,303.60

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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.