Home / 139,159.81-192,050.05-78,730.44

Finding the Fourth Proportional to 139,159.81, 192,050.05 and 78,730.44

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Solution

The fourth proportional to 139,159.81, 192,050.05 and 78,730.44 is: 108,653.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,159.81 : 192,050.05 = 78,730.44 : x
  2. Step 2: Convert to fraction form
    139,159.81/192,050.05 = 78,730.44/x
  3. Step 3: Cross multiply
    139,159.81x = 192,050.05 × 78,730.44
  4. Step 4: Simplify right side
    139,159.81x = 15,120,184,938.52
  5. Step 5: Solve for x
    x = 15,120,184,938.52/139,159.81
  6. Step 6: Final answer
    x = 108,653.39

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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.