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Finding the Fourth Proportional to 139,014.16, 191,839.35 and 75,351.94

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Solution

The fourth proportional to 139,014.16, 191,839.35 and 75,351.94 is: 103,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,014.16 : 191,839.35 = 75,351.94 : x
  2. Step 2: Convert to fraction form
    139,014.16/191,839.35 = 75,351.94/x
  3. Step 3: Cross multiply
    139,014.16x = 191,839.35 × 75,351.94
  4. Step 4: Simplify right side
    139,014.16x = 14,455,466,993.81
  5. Step 5: Solve for x
    x = 14,455,466,993.81/139,014.16
  6. Step 6: Final answer
    x = 103,985.57

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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.