Home / 221,586,723.61-305,827,650.05-128,821,039.86

Finding the Fourth Proportional to 221,586,723.61, 305,827,650.05 and 128,821,039.86

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Solution

The fourth proportional to 221,586,723.61, 305,827,650.05 and 128,821,039.86 is: 177,795,109.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,586,723.61 : 305,827,650.05 = 128,821,039.86 : x
  2. Step 2: Convert to fraction form
    221,586,723.61/305,827,650.05 = 128,821,039.86/x
  3. Step 3: Cross multiply
    221,586,723.61x = 305,827,650.05 × 128,821,039.86
  4. Step 4: Simplify right side
    221,586,723.61x = 39,397,035,897,381,184
  5. Step 5: Solve for x
    x = 39,397,035,897,381,184/221,586,723.61
  6. Step 6: Final answer
    x = 177,795,109.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.