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Finding the Fourth Proportional to 69,849,649.20, 104,774,473.80 and 21,327,409.20

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Solution

The fourth proportional to 69,849,649.20, 104,774,473.80 and 21,327,409.20 is: 31,991,113.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,849,649.20 : 104,774,473.80 = 21,327,409.20 : x
  2. Step 2: Convert to fraction form
    69,849,649.20/104,774,473.80 = 21,327,409.20/x
  3. Step 3: Cross multiply
    69,849,649.20x = 104,774,473.80 × 21,327,409.20
  4. Step 4: Simplify right side
    69,849,649.20x = 2,234,568,076,447,278.75
  5. Step 5: Solve for x
    x = 2,234,568,076,447,278.75/69,849,649.20
  6. Step 6: Final answer
    x = 31,991,113.80

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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.