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Finding the Fourth Proportional to 234,870.31, 324,205.08 and 139,377

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Solution

The fourth proportional to 234,870.31, 324,205.08 and 139,377 is: 192,390.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,870.31 : 324,205.08 = 139,377 : x
  2. Step 2: Convert to fraction form
    234,870.31/324,205.08 = 139,377/x
  3. Step 3: Cross multiply
    234,870.31x = 324,205.08 × 139,377
  4. Step 4: Simplify right side
    234,870.31x = 45,186,731,435.16
  5. Step 5: Solve for x
    x = 45,186,731,435.16/234,870.31
  6. Step 6: Final answer
    x = 192,390.14

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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.