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Finding the Fourth Proportional to 74,704,339.80, 112,056,509.70 and 20,851,651.80

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Solution

The fourth proportional to 74,704,339.80, 112,056,509.70 and 20,851,651.80 is: 31,277,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,704,339.80 : 112,056,509.70 = 20,851,651.80 : x
  2. Step 2: Convert to fraction form
    74,704,339.80/112,056,509.70 = 20,851,651.80/x
  3. Step 3: Cross multiply
    74,704,339.80x = 112,056,509.70 × 20,851,651.80
  4. Step 4: Simplify right side
    74,704,339.80x = 2,336,563,322,187,722.50
  5. Step 5: Solve for x
    x = 2,336,563,322,187,722.50/74,704,339.80
  6. Step 6: Final answer
    x = 31,277,477.70

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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.