Home / 122,136,001.20-183,204,001.80-85,785,436.80

Finding the Fourth Proportional to 122,136,001.20, 183,204,001.80 and 85,785,436.80

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Solution

The fourth proportional to 122,136,001.20, 183,204,001.80 and 85,785,436.80 is: 128,678,155.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,136,001.20 : 183,204,001.80 = 85,785,436.80 : x
  2. Step 2: Convert to fraction form
    122,136,001.20/183,204,001.80 = 85,785,436.80/x
  3. Step 3: Cross multiply
    122,136,001.20x = 183,204,001.80 × 85,785,436.80
  4. Step 4: Simplify right side
    122,136,001.20x = 15,716,235,317,920,986
  5. Step 5: Solve for x
    x = 15,716,235,317,920,986/122,136,001.20
  6. Step 6: Final answer
    x = 128,678,155.20

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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.