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Finding the Fourth Proportional to 200,596,930.80, 300,895,396.20 and 85,805,674.80

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Solution

The fourth proportional to 200,596,930.80, 300,895,396.20 and 85,805,674.80 is: 128,708,512.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,596,930.80 : 300,895,396.20 = 85,805,674.80 : x
  2. Step 2: Convert to fraction form
    200,596,930.80/300,895,396.20 = 85,805,674.80/x
  3. Step 3: Cross multiply
    200,596,930.80x = 300,895,396.20 × 85,805,674.80
  4. Step 4: Simplify right side
    200,596,930.80x = 25,818,532,515,154,352
  5. Step 5: Solve for x
    x = 25,818,532,515,154,352/200,596,930.80
  6. Step 6: Final answer
    x = 128,708,512.20

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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.