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Finding the Fourth Proportional to 91,813,380.30, 137,720,070.45 and 91,813,380.30

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Solution

The fourth proportional to 91,813,380.30, 137,720,070.45 and 91,813,380.30 is: 137,720,070.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,813,380.30 : 137,720,070.45 = 91,813,380.30 : x
  2. Step 2: Convert to fraction form
    91,813,380.30/137,720,070.45 = 91,813,380.30/x
  3. Step 3: Cross multiply
    91,813,380.30x = 137,720,070.45 × 91,813,380.30
  4. Step 4: Simplify right side
    91,813,380.30x = 12,644,545,203,168,640
  5. Step 5: Solve for x
    x = 12,644,545,203,168,640/91,813,380.30
  6. Step 6: Final answer
    x = 137,720,070.45

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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.