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Finding the Fourth Proportional to 235,139.82, 324,483.75 and 139,644.06

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Solution

The fourth proportional to 235,139.82, 324,483.75 and 139,644.06 is: 192,703.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,139.82 : 324,483.75 = 139,644.06 : x
  2. Step 2: Convert to fraction form
    235,139.82/324,483.75 = 139,644.06/x
  3. Step 3: Cross multiply
    235,139.82x = 324,483.75 × 139,644.06
  4. Step 4: Simplify right side
    235,139.82x = 45,312,228,254.03
  5. Step 5: Solve for x
    x = 45,312,228,254.03/235,139.82
  6. Step 6: Final answer
    x = 192,703.34

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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.