Home / 280,932,111.81-421,438,544.78-86,858,660.61

Finding the Fourth Proportional to 280,932,111.81, 421,438,544.78 and 86,858,660.61

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Solution

The fourth proportional to 280,932,111.81, 421,438,544.78 and 86,858,660.61 is: 130,300,474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,932,111.81 : 421,438,544.78 = 86,858,660.61 : x
  2. Step 2: Convert to fraction form
    280,932,111.81/421,438,544.78 = 86,858,660.61/x
  3. Step 3: Cross multiply
    280,932,111.81x = 421,438,544.78 × 86,858,660.61
  4. Step 4: Simplify right side
    280,932,111.81x = 36,605,587,529,018,304
  5. Step 5: Solve for x
    x = 36,605,587,529,018,304/280,932,111.81
  6. Step 6: Final answer
    x = 130,300,474.71

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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.