Home / 85,542,002.20-128,029,568.10-78,739,557.40

Finding the Fourth Proportional to 85,542,002.20, 128,029,568.10 and 78,739,557.40

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Solution

The fourth proportional to 85,542,002.20, 128,029,568.10 and 78,739,557.40 is: 117,848,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,542,002.20 : 128,029,568.10 = 78,739,557.40 : x
  2. Step 2: Convert to fraction form
    85,542,002.20/128,029,568.10 = 78,739,557.40/x
  3. Step 3: Cross multiply
    85,542,002.20x = 128,029,568.10 × 78,739,557.40
  4. Step 4: Simplify right side
    85,542,002.20x = 10,080,991,526,307,160
  5. Step 5: Solve for x
    x = 10,080,991,526,307,160/85,542,002.20
  6. Step 6: Final answer
    x = 117,848,440.15

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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.