Home / 280,011.15-420,071.40-111,502.80

Finding the Fourth Proportional to 280,011.15, 420,071.40 and 111,502.80

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Solution

The fourth proportional to 280,011.15, 420,071.40 and 111,502.80 is: 167,275.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,011.15 : 420,071.40 = 111,502.80 : x
  2. Step 2: Convert to fraction form
    280,011.15/420,071.40 = 111,502.80/x
  3. Step 3: Cross multiply
    280,011.15x = 420,071.40 × 111,502.80
  4. Step 4: Simplify right side
    280,011.15x = 46,839,137,299.92
  5. Step 5: Solve for x
    x = 46,839,137,299.92/280,011.15
  6. Step 6: Final answer
    x = 167,275.97

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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.