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Finding the Fourth Proportional to 245,807.19, 339,246.26 and 138,398.16

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Solution

The fourth proportional to 245,807.19, 339,246.26 and 138,398.16 is: 191,007.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,807.19 : 339,246.26 = 138,398.16 : x
  2. Step 2: Convert to fraction form
    245,807.19/339,246.26 = 138,398.16/x
  3. Step 3: Cross multiply
    245,807.19x = 339,246.26 × 138,398.16
  4. Step 4: Simplify right side
    245,807.19x = 46,951,058,170.88
  5. Step 5: Solve for x
    x = 46,951,058,170.88/245,807.19
  6. Step 6: Final answer
    x = 191,007.67

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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.