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Finding the Fourth Proportional to 239,870.50, 331,050.45 and 139,268.50

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Solution

The fourth proportional to 239,870.50, 331,050.45 and 139,268.50 is: 192,207.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,870.50 : 331,050.45 = 139,268.50 : x
  2. Step 2: Convert to fraction form
    239,870.50/331,050.45 = 139,268.50/x
  3. Step 3: Cross multiply
    239,870.50x = 331,050.45 × 139,268.50
  4. Step 4: Simplify right side
    239,870.50x = 46,104,899,595.83
  5. Step 5: Solve for x
    x = 46,104,899,595.83/239,870.50
  6. Step 6: Final answer
    x = 192,207.46

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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.