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Finding the Fourth Proportional to 74,679,880.40, 112,019,820.60 and 70,144,917.20

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Solution

The fourth proportional to 74,679,880.40, 112,019,820.60 and 70,144,917.20 is: 105,217,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,679,880.40 : 112,019,820.60 = 70,144,917.20 : x
  2. Step 2: Convert to fraction form
    74,679,880.40/112,019,820.60 = 70,144,917.20/x
  3. Step 3: Cross multiply
    74,679,880.40x = 112,019,820.60 × 70,144,917.20
  4. Step 4: Simplify right side
    74,679,880.40x = 7,857,621,040,745,854
  5. Step 5: Solve for x
    x = 7,857,621,040,745,854/74,679,880.40
  6. Step 6: Final answer
    x = 105,217,375.80

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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.