Home / 345,525.38-518,381.50-105,647.78

Finding the Fourth Proportional to 345,525.38, 518,381.50 and 105,647.78

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Solution

The fourth proportional to 345,525.38, 518,381.50 and 105,647.78 is: 158,500.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,525.38 : 518,381.50 = 105,647.78 : x
  2. Step 2: Convert to fraction form
    345,525.38/518,381.50 = 105,647.78/x
  3. Step 3: Cross multiply
    345,525.38x = 518,381.50 × 105,647.78
  4. Step 4: Simplify right side
    345,525.38x = 54,765,854,871.89
  5. Step 5: Solve for x
    x = 54,765,854,871.89/345,525.38
  6. Step 6: Final answer
    x = 158,500.24

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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.