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Finding the Fourth Proportional to 139,776.60, 192,892.08 and 76,114.76

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Solution

The fourth proportional to 139,776.60, 192,892.08 and 76,114.76 is: 105,038.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,776.60 : 192,892.08 = 76,114.76 : x
  2. Step 2: Convert to fraction form
    139,776.60/192,892.08 = 76,114.76/x
  3. Step 3: Cross multiply
    139,776.60x = 192,892.08 × 76,114.76
  4. Step 4: Simplify right side
    139,776.60x = 14,681,934,375.10
  5. Step 5: Solve for x
    x = 14,681,934,375.10/139,776.60
  6. Step 6: Final answer
    x = 105,038.57

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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.