Home / 280,106.10-420,110.55-102,521.70

Finding the Fourth Proportional to 280,106.10, 420,110.55 and 102,521.70

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Solution

The fourth proportional to 280,106.10, 420,110.55 and 102,521.70 is: 153,764.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,106.10 : 420,110.55 = 102,521.70 : x
  2. Step 2: Convert to fraction form
    280,106.10/420,110.55 = 102,521.70/x
  3. Step 3: Cross multiply
    280,106.10x = 420,110.55 × 102,521.70
  4. Step 4: Simplify right side
    280,106.10x = 43,070,447,773.94
  5. Step 5: Solve for x
    x = 43,070,447,773.94/280,106.10
  6. Step 6: Final answer
    x = 153,764.76

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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.