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Finding the Fourth Proportional to 139,020.50, 191,848.58 and 75,358.30

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Solution

The fourth proportional to 139,020.50, 191,848.58 and 75,358.30 is: 103,994.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,020.50 : 191,848.58 = 75,358.30 : x
  2. Step 2: Convert to fraction form
    139,020.50/191,848.58 = 75,358.30/x
  3. Step 3: Cross multiply
    139,020.50x = 191,848.58 × 75,358.30
  4. Step 4: Simplify right side
    139,020.50x = 14,457,382,554.99
  5. Step 5: Solve for x
    x = 14,457,382,554.99/139,020.50
  6. Step 6: Final answer
    x = 103,994.61

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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.