Home / 280,932,110.81-421,438,543.28-86,858,659.61

Finding the Fourth Proportional to 280,932,110.81, 421,438,543.28 and 86,858,659.61

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Solution

The fourth proportional to 280,932,110.81, 421,438,543.28 and 86,858,659.61 is: 130,300,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,932,110.81 : 421,438,543.28 = 86,858,659.61 : x
  2. Step 2: Convert to fraction form
    280,932,110.81/421,438,543.28 = 86,858,659.61/x
  3. Step 3: Cross multiply
    280,932,110.81x = 421,438,543.28 × 86,858,659.61
  4. Step 4: Simplify right side
    280,932,110.81x = 36,605,586,975,470,896
  5. Step 5: Solve for x
    x = 36,605,586,975,470,896/280,932,110.81
  6. Step 6: Final answer
    x = 130,300,473.20

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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.