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Finding the Fourth Proportional to 82,720,438.80, 124,080,658.20 and 82,720,438.80

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Solution

The fourth proportional to 82,720,438.80, 124,080,658.20 and 82,720,438.80 is: 124,080,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,720,438.80 : 124,080,658.20 = 82,720,438.80 : x
  2. Step 2: Convert to fraction form
    82,720,438.80/124,080,658.20 = 82,720,438.80/x
  3. Step 3: Cross multiply
    82,720,438.80x = 124,080,658.20 × 82,720,438.80
  4. Step 4: Simplify right side
    82,720,438.80x = 10,264,006,492,896,818
  5. Step 5: Solve for x
    x = 10,264,006,492,896,818/82,720,438.80
  6. Step 6: Final answer
    x = 124,080,658.20

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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.