Home / 106,699.46-147,120.36-72,728.06

Finding the Fourth Proportional to 106,699.46, 147,120.36 and 72,728.06

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Solution

The fourth proportional to 106,699.46, 147,120.36 and 72,728.06 is: 100,279.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,699.46 : 147,120.36 = 72,728.06 : x
  2. Step 2: Convert to fraction form
    106,699.46/147,120.36 = 72,728.06/x
  3. Step 3: Cross multiply
    106,699.46x = 147,120.36 × 72,728.06
  4. Step 4: Simplify right side
    106,699.46x = 10,699,778,369.30
  5. Step 5: Solve for x
    x = 10,699,778,369.30/106,699.46
  6. Step 6: Final answer
    x = 100,279.59

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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.