Home / 280,482,459.42-420,768,898.06-86,393,784.33

Finding the Fourth Proportional to 280,482,459.42, 420,768,898.06 and 86,393,784.33

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Solution

The fourth proportional to 280,482,459.42, 420,768,898.06 and 86,393,784.33 is: 129,604,601.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,482,459.42 : 420,768,898.06 = 86,393,784.33 : x
  2. Step 2: Convert to fraction form
    280,482,459.42/420,768,898.06 = 86,393,784.33/x
  3. Step 3: Cross multiply
    280,482,459.42x = 420,768,898.06 × 86,393,784.33
  4. Step 4: Simplify right side
    280,482,459.42x = 36,351,817,432,603,328
  5. Step 5: Solve for x
    x = 36,351,817,432,603,328/280,482,459.42
  6. Step 6: Final answer
    x = 129,604,601.69

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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.