Home / 154,145.86-231,061.13-78,103.54

Finding the Fourth Proportional to 154,145.86, 231,061.13 and 78,103.54

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Solution

The fourth proportional to 154,145.86, 231,061.13 and 78,103.54 is: 117,075.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,145.86 : 231,061.13 = 78,103.54 : x
  2. Step 2: Convert to fraction form
    154,145.86/231,061.13 = 78,103.54/x
  3. Step 3: Cross multiply
    154,145.86x = 231,061.13 × 78,103.54
  4. Step 4: Simplify right side
    154,145.86x = 18,046,691,054.09
  5. Step 5: Solve for x
    x = 18,046,691,054.09/154,145.86
  6. Step 6: Final answer
    x = 117,075.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.