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Finding the Fourth Proportional to 139,020.34, 191,848.32 and 75,358.29

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Solution

The fourth proportional to 139,020.34, 191,848.32 and 75,358.29 is: 103,994.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,020.34 : 191,848.32 = 75,358.29 : x
  2. Step 2: Convert to fraction form
    139,020.34/191,848.32 = 75,358.29/x
  3. Step 3: Cross multiply
    139,020.34x = 191,848.32 × 75,358.29
  4. Step 4: Simplify right side
    139,020.34x = 14,457,361,334.57
  5. Step 5: Solve for x
    x = 14,457,361,334.57/139,020.34
  6. Step 6: Final answer
    x = 103,994.58

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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.