Home / 128,783,427.31-177,704,998.93-87,058,278.06

Finding the Fourth Proportional to 128,783,427.31, 177,704,998.93 and 87,058,278.06

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Solution

The fourth proportional to 128,783,427.31, 177,704,998.93 and 87,058,278.06 is: 120,129,519.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,783,427.31 : 177,704,998.93 = 87,058,278.06 : x
  2. Step 2: Convert to fraction form
    128,783,427.31/177,704,998.93 = 87,058,278.06/x
  3. Step 3: Cross multiply
    128,783,427.31x = 177,704,998.93 × 87,058,278.06
  4. Step 4: Simplify right side
    128,783,427.31x = 15,470,691,208,452,748
  5. Step 5: Solve for x
    x = 15,470,691,208,452,748/128,783,427.31
  6. Step 6: Final answer
    x = 120,129,519.24

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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.