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Finding the Fourth Proportional to 140,453,999.70, 210,680,999.55 and 72,429,551.70

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Solution

The fourth proportional to 140,453,999.70, 210,680,999.55 and 72,429,551.70 is: 108,644,327.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,453,999.70 : 210,680,999.55 = 72,429,551.70 : x
  2. Step 2: Convert to fraction form
    140,453,999.70/210,680,999.55 = 72,429,551.70/x
  3. Step 3: Cross multiply
    140,453,999.70x = 210,680,999.55 × 72,429,551.70
  4. Step 4: Simplify right side
    140,453,999.70x = 15,259,530,349,114,404
  5. Step 5: Solve for x
    x = 15,259,530,349,114,404/140,453,999.70
  6. Step 6: Final answer
    x = 108,644,327.55

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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.