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Finding the Fourth Proportional to 127,903,940.80, 191,813,920.80 and 47,114,411.20

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Solution

The fourth proportional to 127,903,940.80, 191,813,920.80 and 47,114,411.20 is: 70,656,149.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,903,940.80 : 191,813,920.80 = 47,114,411.20 : x
  2. Step 2: Convert to fraction form
    127,903,940.80/191,813,920.80 = 47,114,411.20/x
  3. Step 3: Cross multiply
    127,903,940.80x = 191,813,920.80 × 47,114,411.20
  4. Step 4: Simplify right side
    127,903,940.80x = 9,037,199,938,455,434
  5. Step 5: Solve for x
    x = 9,037,199,938,455,434/127,903,940.80
  6. Step 6: Final answer
    x = 70,656,149.31

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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.