Home / 139,271.31-192,240.14-81,908.12

Finding the Fourth Proportional to 139,271.31, 192,240.14 and 81,908.12

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Solution

The fourth proportional to 139,271.31, 192,240.14 and 81,908.12 is: 113,060.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,271.31 : 192,240.14 = 81,908.12 : x
  2. Step 2: Convert to fraction form
    139,271.31/192,240.14 = 81,908.12/x
  3. Step 3: Cross multiply
    139,271.31x = 192,240.14 × 81,908.12
  4. Step 4: Simplify right side
    139,271.31x = 15,746,028,527.00
  5. Step 5: Solve for x
    x = 15,746,028,527.00/139,271.31
  6. Step 6: Final answer
    x = 113,060.10

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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.