Home / 211,005.11-291,192.18-115,511.51

Finding the Fourth Proportional to 211,005.11, 291,192.18 and 115,511.51

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Solution

The fourth proportional to 211,005.11, 291,192.18 and 115,511.51 is: 159,408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,005.11 : 291,192.18 = 115,511.51 : x
  2. Step 2: Convert to fraction form
    211,005.11/291,192.18 = 115,511.51/x
  3. Step 3: Cross multiply
    211,005.11x = 291,192.18 × 115,511.51
  4. Step 4: Simplify right side
    211,005.11x = 33,636,048,411.99
  5. Step 5: Solve for x
    x = 33,636,048,411.99/211,005.11
  6. Step 6: Final answer
    x = 159,408.69

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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.