Home / 140,123.70-210,185.55-90,260.10

Finding the Fourth Proportional to 140,123.70, 210,185.55 and 90,260.10

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Solution

The fourth proportional to 140,123.70, 210,185.55 and 90,260.10 is: 135,390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,123.70 : 210,185.55 = 90,260.10 : x
  2. Step 2: Convert to fraction form
    140,123.70/210,185.55 = 90,260.10/x
  3. Step 3: Cross multiply
    140,123.70x = 210,185.55 × 90,260.10
  4. Step 4: Simplify right side
    140,123.70x = 18,971,368,761.56
  5. Step 5: Solve for x
    x = 18,971,368,761.56/140,123.70
  6. Step 6: Final answer
    x = 135,390.15

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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.