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Finding the Fourth Proportional to 69,849,647.70, 104,774,471.55 and 21,327,407.70

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Solution

The fourth proportional to 69,849,647.70, 104,774,471.55 and 21,327,407.70 is: 31,991,111.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,849,647.70 : 104,774,471.55 = 21,327,407.70 : x
  2. Step 2: Convert to fraction form
    69,849,647.70/104,774,471.55 = 21,327,407.70/x
  3. Step 3: Cross multiply
    69,849,647.70x = 104,774,471.55 × 21,327,407.70
  4. Step 4: Simplify right side
    69,849,647.70x = 2,234,567,871,298,900.75
  5. Step 5: Solve for x
    x = 2,234,567,871,298,900.75/69,849,647.70
  6. Step 6: Final answer
    x = 31,991,111.55

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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.