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Finding the Fourth Proportional to 172,860.47, 238,462.64 and 115,513.87

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Solution

The fourth proportional to 172,860.47, 238,462.64 and 115,513.87 is: 159,352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,860.47 : 238,462.64 = 115,513.87 : x
  2. Step 2: Convert to fraction form
    172,860.47/238,462.64 = 115,513.87/x
  3. Step 3: Cross multiply
    172,860.47x = 238,462.64 × 115,513.87
  4. Step 4: Simplify right side
    172,860.47x = 27,545,742,396.82
  5. Step 5: Solve for x
    x = 27,545,742,396.82/172,860.47
  6. Step 6: Final answer
    x = 159,352.47

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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.