Home / 139,230.40-192,122-77,968.06

Finding the Fourth Proportional to 139,230.40, 192,122 and 77,968.06

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Solution

The fourth proportional to 139,230.40, 192,122 and 77,968.06 is: 107,586.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.40 : 192,122 = 77,968.06 : x
  2. Step 2: Convert to fraction form
    139,230.40/192,122 = 77,968.06/x
  3. Step 3: Cross multiply
    139,230.40x = 192,122 × 77,968.06
  4. Step 4: Simplify right side
    139,230.40x = 14,979,379,623.32
  5. Step 5: Solve for x
    x = 14,979,379,623.32/139,230.40
  6. Step 6: Final answer
    x = 107,586.99

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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.