Home / 145,961.40-218,942.10-40,780.20

Finding the Fourth Proportional to 145,961.40, 218,942.10 and 40,780.20

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Solution

The fourth proportional to 145,961.40, 218,942.10 and 40,780.20 is: 61,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,961.40 : 218,942.10 = 40,780.20 : x
  2. Step 2: Convert to fraction form
    145,961.40/218,942.10 = 40,780.20/x
  3. Step 3: Cross multiply
    145,961.40x = 218,942.10 × 40,780.20
  4. Step 4: Simplify right side
    145,961.40x = 8,928,502,626.42
  5. Step 5: Solve for x
    x = 8,928,502,626.42/145,961.40
  6. Step 6: Final answer
    x = 61,170.30

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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.