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Finding the Fourth Proportional to 280,070.19, 420,103.13 and 69,706.71

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Solution

The fourth proportional to 280,070.19, 420,103.13 and 69,706.71 is: 104,559.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,070.19 : 420,103.13 = 69,706.71 : x
  2. Step 2: Convert to fraction form
    280,070.19/420,103.13 = 69,706.71/x
  3. Step 3: Cross multiply
    280,070.19x = 420,103.13 × 69,706.71
  4. Step 4: Simplify right side
    280,070.19x = 29,284,006,704.47
  5. Step 5: Solve for x
    x = 29,284,006,704.47/280,070.19
  6. Step 6: Final answer
    x = 104,559.53

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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.