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Finding the Fourth Proportional to 251,709, 347,358.51 and 138,529.32

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Solution

The fourth proportional to 251,709, 347,358.51 and 138,529.32 is: 191,170.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,709 : 347,358.51 = 138,529.32 : x
  2. Step 2: Convert to fraction form
    251,709/347,358.51 = 138,529.32/x
  3. Step 3: Cross multiply
    251,709x = 347,358.51 × 138,529.32
  4. Step 4: Simplify right side
    251,709x = 48,119,338,186.51
  5. Step 5: Solve for x
    x = 48,119,338,186.51/251,709
  6. Step 6: Final answer
    x = 191,170.51

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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.