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Finding the Fourth Proportional to 72,610,940.80, 108,916,411.20 and 56,171,699.20

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Solution

The fourth proportional to 72,610,940.80, 108,916,411.20 and 56,171,699.20 is: 84,257,548.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,610,940.80 : 108,916,411.20 = 56,171,699.20 : x
  2. Step 2: Convert to fraction form
    72,610,940.80/108,916,411.20 = 56,171,699.20/x
  3. Step 3: Cross multiply
    72,610,940.80x = 108,916,411.20 × 56,171,699.20
  4. Step 4: Simplify right side
    72,610,940.80x = 6,118,019,887,869,912
  5. Step 5: Solve for x
    x = 6,118,019,887,869,912/72,610,940.80
  6. Step 6: Final answer
    x = 84,257,548.80

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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.