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Finding the Fourth Proportional to 7,929,316.80, 11,123,438.40 and 7,929,316.80

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Solution

The fourth proportional to 7,929,316.80, 11,123,438.40 and 7,929,316.80 is: 11,123,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929,316.80 : 11,123,438.40 = 7,929,316.80 : x
  2. Step 2: Convert to fraction form
    7,929,316.80/11,123,438.40 = 7,929,316.80/x
  3. Step 3: Cross multiply
    7,929,316.80x = 11,123,438.40 × 7,929,316.80
  4. Step 4: Simplify right side
    7,929,316.80x = 88,201,266,978,885.12
  5. Step 5: Solve for x
    x = 88,201,266,978,885.12/7,929,316.80
  6. Step 6: Final answer
    x = 11,123,438.40

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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.