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Finding the Fourth Proportional to 139,366.63, 192,339.33 and 78,112.51

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Solution

The fourth proportional to 139,366.63, 192,339.33 and 78,112.51 is: 107,802.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,366.63 : 192,339.33 = 78,112.51 : x
  2. Step 2: Convert to fraction form
    139,366.63/192,339.33 = 78,112.51/x
  3. Step 3: Cross multiply
    139,366.63x = 192,339.33 × 78,112.51
  4. Step 4: Simplify right side
    139,366.63x = 15,024,107,605.20
  5. Step 5: Solve for x
    x = 15,024,107,605.20/139,366.63
  6. Step 6: Final answer
    x = 107,802.77

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1.5x scale

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.