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Finding the Fourth Proportional to 280,715.88, 421,081.50 and 93,720.68

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Solution

The fourth proportional to 280,715.88, 421,081.50 and 93,720.68 is: 140,583.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,715.88 : 421,081.50 = 93,720.68 : x
  2. Step 2: Convert to fraction form
    280,715.88/421,081.50 = 93,720.68/x
  3. Step 3: Cross multiply
    280,715.88x = 421,081.50 × 93,720.68
  4. Step 4: Simplify right side
    280,715.88x = 39,464,044,515.42
  5. Step 5: Solve for x
    x = 39,464,044,515.42/280,715.88
  6. Step 6: Final answer
    x = 140,583.58

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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.