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Finding the Fourth Proportional to 643,823,266.80, 965,734,900.20 and 159,149,074.80

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Solution

The fourth proportional to 643,823,266.80, 965,734,900.20 and 159,149,074.80 is: 238,723,612.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,823,266.80 : 965,734,900.20 = 159,149,074.80 : x
  2. Step 2: Convert to fraction form
    643,823,266.80/965,734,900.20 = 159,149,074.80/x
  3. Step 3: Cross multiply
    643,823,266.80x = 965,734,900.20 × 159,149,074.80
  4. Step 4: Simplify right side
    643,823,266.80x = 153,695,815,868,900,352
  5. Step 5: Solve for x
    x = 153,695,815,868,900,352/643,823,266.80
  6. Step 6: Final answer
    x = 238,723,612.20

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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.