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Finding the Fourth Proportional to 80,596,989.60, 120,895,484.40 and 20,012,715.60

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Solution

The fourth proportional to 80,596,989.60, 120,895,484.40 and 20,012,715.60 is: 30,019,073.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,596,989.60 : 120,895,484.40 = 20,012,715.60 : x
  2. Step 2: Convert to fraction form
    80,596,989.60/120,895,484.40 = 20,012,715.60/x
  3. Step 3: Cross multiply
    80,596,989.60x = 120,895,484.40 × 20,012,715.60
  4. Step 4: Simplify right side
    80,596,989.60x = 2,419,446,946,621,437
  5. Step 5: Solve for x
    x = 2,419,446,946,621,437/80,596,989.60
  6. Step 6: Final answer
    x = 30,019,073.40

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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.