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Finding the Fourth Proportional to 139,241.16, 192,152.88 and 75,578.94

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Solution

The fourth proportional to 139,241.16, 192,152.88 and 75,578.94 is: 104,298.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,241.16 : 192,152.88 = 75,578.94 : x
  2. Step 2: Convert to fraction form
    139,241.16/192,152.88 = 75,578.94/x
  3. Step 3: Cross multiply
    139,241.16x = 192,152.88 × 75,578.94
  4. Step 4: Simplify right side
    139,241.16x = 14,522,710,988.35
  5. Step 5: Solve for x
    x = 14,522,710,988.35/139,241.16
  6. Step 6: Final answer
    x = 104,298.98

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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.