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Finding the Fourth Proportional to 72,076,272.80, 108,103,911.60 and 20,952,960.80

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Solution

The fourth proportional to 72,076,272.80, 108,103,911.60 and 20,952,960.80 is: 31,426,389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,076,272.80 : 108,103,911.60 = 20,952,960.80 : x
  2. Step 2: Convert to fraction form
    72,076,272.80/108,103,911.60 = 20,952,960.80/x
  3. Step 3: Cross multiply
    72,076,272.80x = 108,103,911.60 × 20,952,960.80
  4. Step 4: Simplify right side
    72,076,272.80x = 2,265,097,022,081,465
  5. Step 5: Solve for x
    x = 2,265,097,022,081,465/72,076,272.80
  6. Step 6: Final answer
    x = 31,426,389.49

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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.