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Finding the Fourth Proportional to 99,692,939.20, 139,771,668.80 and 99,692,939.20

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Solution

The fourth proportional to 99,692,939.20, 139,771,668.80 and 99,692,939.20 is: 139,771,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,692,939.20 : 139,771,668.80 = 99,692,939.20 : x
  2. Step 2: Convert to fraction form
    99,692,939.20/139,771,668.80 = 99,692,939.20/x
  3. Step 3: Cross multiply
    99,692,939.20x = 139,771,668.80 × 99,692,939.20
  4. Step 4: Simplify right side
    99,692,939.20x = 13,934,248,479,560,938
  5. Step 5: Solve for x
    x = 13,934,248,479,560,938/99,692,939.20
  6. Step 6: Final answer
    x = 139,771,668.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.