Home / 128,783,376-177,704,928.47-87,058,227.04

Finding the Fourth Proportional to 128,783,376, 177,704,928.47 and 87,058,227.04

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Solution

The fourth proportional to 128,783,376, 177,704,928.47 and 87,058,227.04 is: 120,129,449.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,783,376 : 177,704,928.47 = 87,058,227.04 : x
  2. Step 2: Convert to fraction form
    128,783,376/177,704,928.47 = 87,058,227.04/x
  3. Step 3: Cross multiply
    128,783,376x = 177,704,928.47 × 87,058,227.04
  4. Step 4: Simplify right side
    128,783,376x = 15,470,676,008,641,602
  5. Step 5: Solve for x
    x = 15,470,676,008,641,602/128,783,376
  6. Step 6: Final answer
    x = 120,129,449.07

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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.