Home / 134,990.09-186,288.30-78,401.47

Finding the Fourth Proportional to 134,990.09, 186,288.30 and 78,401.47

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Solution

The fourth proportional to 134,990.09, 186,288.30 and 78,401.47 is: 108,195.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,990.09 : 186,288.30 = 78,401.47 : x
  2. Step 2: Convert to fraction form
    134,990.09/186,288.30 = 78,401.47/x
  3. Step 3: Cross multiply
    134,990.09x = 186,288.30 × 78,401.47
  4. Step 4: Simplify right side
    134,990.09x = 14,605,275,240.35
  5. Step 5: Solve for x
    x = 14,605,275,240.35/134,990.09
  6. Step 6: Final answer
    x = 108,195.17

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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.