Home / 280,240,211.70-420,360,317.55-72,978,221.70

Finding the Fourth Proportional to 280,240,211.70, 420,360,317.55 and 72,978,221.70

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Solution

The fourth proportional to 280,240,211.70, 420,360,317.55 and 72,978,221.70 is: 109,467,332.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,240,211.70 : 420,360,317.55 = 72,978,221.70 : x
  2. Step 2: Convert to fraction form
    280,240,211.70/420,360,317.55 = 72,978,221.70/x
  3. Step 3: Cross multiply
    280,240,211.70x = 420,360,317.55 × 72,978,221.70
  4. Step 4: Simplify right side
    280,240,211.70x = 30,677,148,448,046,304
  5. Step 5: Solve for x
    x = 30,677,148,448,046,304/280,240,211.70
  6. Step 6: Final answer
    x = 109,467,332.55

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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.