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Finding the Fourth Proportional to 139,690.98, 192,773.54 and 76,029.23

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Solution

The fourth proportional to 139,690.98, 192,773.54 and 76,029.23 is: 104,920.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,690.98 : 192,773.54 = 76,029.23 : x
  2. Step 2: Convert to fraction form
    139,690.98/192,773.54 = 76,029.23/x
  3. Step 3: Cross multiply
    139,690.98x = 192,773.54 × 76,029.23
  4. Step 4: Simplify right side
    139,690.98x = 14,656,424,482.58
  5. Step 5: Solve for x
    x = 14,656,424,482.58/139,690.98
  6. Step 6: Final answer
    x = 104,920.34

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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.