Home / 128,982,467.16-177,788,345.20-87,153,467.76

Finding the Fourth Proportional to 128,982,467.16, 177,788,345.20 and 87,153,467.76

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Solution

The fourth proportional to 128,982,467.16, 177,788,345.20 and 87,153,467.76 is: 120,131,605.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,982,467.16 : 177,788,345.20 = 87,153,467.76 : x
  2. Step 2: Convert to fraction form
    128,982,467.16/177,788,345.20 = 87,153,467.76/x
  3. Step 3: Cross multiply
    128,982,467.16x = 177,788,345.20 × 87,153,467.76
  4. Step 4: Simplify right side
    128,982,467.16x = 15,494,870,811,491,950
  5. Step 5: Solve for x
    x = 15,494,870,811,491,950/128,982,467.16
  6. Step 6: Final answer
    x = 120,131,605.11

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