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Finding the Fourth Proportional to 70,073,858.20, 105,092,124.90 and 21,551,618.20

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Solution

The fourth proportional to 70,073,858.20, 105,092,124.90 and 21,551,618.20 is: 32,321,687.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,073,858.20 : 105,092,124.90 = 21,551,618.20 : x
  2. Step 2: Convert to fraction form
    70,073,858.20/105,092,124.90 = 21,551,618.20/x
  3. Step 3: Cross multiply
    70,073,858.20x = 105,092,124.90 × 21,551,618.20
  4. Step 4: Simplify right side
    70,073,858.20x = 2,264,905,351,671,513
  5. Step 5: Solve for x
    x = 2,264,905,351,671,513/70,073,858.20
  6. Step 6: Final answer
    x = 32,321,687.57

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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.