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Finding the Fourth Proportional to 53,172,652.20, 79,758,978.30 and 45,519,901.80

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Solution

The fourth proportional to 53,172,652.20, 79,758,978.30 and 45,519,901.80 is: 68,279,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,172,652.20 : 79,758,978.30 = 45,519,901.80 : x
  2. Step 2: Convert to fraction form
    53,172,652.20/79,758,978.30 = 45,519,901.80/x
  3. Step 3: Cross multiply
    53,172,652.20x = 79,758,978.30 × 45,519,901.80
  4. Step 4: Simplify right side
    53,172,652.20x = 3,630,620,859,884,330.50
  5. Step 5: Solve for x
    x = 3,630,620,859,884,330.50/53,172,652.20
  6. Step 6: Final answer
    x = 68,279,852.70

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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.