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Finding the Fourth Proportional to 139,157.81, 192,038.15 and 75,495.61

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Solution

The fourth proportional to 139,157.81, 192,038.15 and 75,495.61 is: 104,184.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,157.81 : 192,038.15 = 75,495.61 : x
  2. Step 2: Convert to fraction form
    139,157.81/192,038.15 = 75,495.61/x
  3. Step 3: Cross multiply
    139,157.81x = 192,038.15 × 75,495.61
  4. Step 4: Simplify right side
    139,157.81x = 14,498,037,466.26
  5. Step 5: Solve for x
    x = 14,498,037,466.26/139,157.81
  6. Step 6: Final answer
    x = 104,184.14

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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.