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Finding the Fourth Proportional to 139,645.55, 192,707.07 and 75,981.98

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Solution

The fourth proportional to 139,645.55, 192,707.07 and 75,981.98 is: 104,853.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,645.55 : 192,707.07 = 75,981.98 : x
  2. Step 2: Convert to fraction form
    139,645.55/192,707.07 = 75,981.98/x
  3. Step 3: Cross multiply
    139,645.55x = 192,707.07 × 75,981.98
  4. Step 4: Simplify right side
    139,645.55x = 14,642,263,775.06
  5. Step 5: Solve for x
    x = 14,642,263,775.06/139,645.55
  6. Step 6: Final answer
    x = 104,853.07

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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.