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Finding the Fourth Proportional to 245,938.44, 339,391.71 and 138,509.76

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Solution

The fourth proportional to 245,938.44, 339,391.71 and 138,509.76 is: 191,141.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,938.44 : 339,391.71 = 138,509.76 : x
  2. Step 2: Convert to fraction form
    245,938.44/339,391.71 = 138,509.76/x
  3. Step 3: Cross multiply
    245,938.44x = 339,391.71 × 138,509.76
  4. Step 4: Simplify right side
    245,938.44x = 47,009,064,298.09
  5. Step 5: Solve for x
    x = 47,009,064,298.09/245,938.44
  6. Step 6: Final answer
    x = 191,141.59

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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.