Home / 128,122,307.28-192,490,055.73-82,154,238.12

Finding the Fourth Proportional to 128,122,307.28, 192,490,055.73 and 82,154,238.12

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Solution

The fourth proportional to 128,122,307.28, 192,490,055.73 and 82,154,238.12 is: 123,427,951.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,122,307.28 : 192,490,055.73 = 82,154,238.12 : x
  2. Step 2: Convert to fraction form
    128,122,307.28/192,490,055.73 = 82,154,238.12/x
  3. Step 3: Cross multiply
    128,122,307.28x = 192,490,055.73 × 82,154,238.12
  4. Step 4: Simplify right side
    128,122,307.28x = 15,813,873,874,174,490
  5. Step 5: Solve for x
    x = 15,813,873,874,174,490/128,122,307.28
  6. Step 6: Final answer
    x = 123,427,951.07

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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.