Home / 128,122,349.95-192,490,119.54-82,154,280.82

Finding the Fourth Proportional to 128,122,349.95, 192,490,119.54 and 82,154,280.82

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Solution

The fourth proportional to 128,122,349.95, 192,490,119.54 and 82,154,280.82 is: 123,428,015.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,122,349.95 : 192,490,119.54 = 82,154,280.82 : x
  2. Step 2: Convert to fraction form
    128,122,349.95/192,490,119.54 = 82,154,280.82/x
  3. Step 3: Cross multiply
    128,122,349.95x = 192,490,119.54 × 82,154,280.82
  4. Step 4: Simplify right side
    128,122,349.95x = 15,813,887,335,353,756
  5. Step 5: Solve for x
    x = 15,813,887,335,353,756/128,122,349.95
  6. Step 6: Final answer
    x = 123,428,015.04

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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.