Home / 128,105,813.70-192,158,720.55-121,835,247.30

Finding the Fourth Proportional to 128,105,813.70, 192,158,720.55 and 121,835,247.30

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Solution

The fourth proportional to 128,105,813.70, 192,158,720.55 and 121,835,247.30 is: 182,752,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105,813.70 : 192,158,720.55 = 121,835,247.30 : x
  2. Step 2: Convert to fraction form
    128,105,813.70/192,158,720.55 = 121,835,247.30/x
  3. Step 3: Cross multiply
    128,105,813.70x = 192,158,720.55 × 121,835,247.30
  4. Step 4: Simplify right side
    128,105,813.70x = 23,411,705,239,060,844
  5. Step 5: Solve for x
    x = 23,411,705,239,060,844/128,105,813.70
  6. Step 6: Final answer
    x = 182,752,870.95

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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.