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Finding the Fourth Proportional to 280,064.80, 420,096.32 and 69,702.80

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Solution

The fourth proportional to 280,064.80, 420,096.32 and 69,702.80 is: 104,553.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,064.80 : 420,096.32 = 69,702.80 : x
  2. Step 2: Convert to fraction form
    280,064.80/420,096.32 = 69,702.80/x
  3. Step 3: Cross multiply
    280,064.80x = 420,096.32 × 69,702.80
  4. Step 4: Simplify right side
    280,064.80x = 29,281,889,773.70
  5. Step 5: Solve for x
    x = 29,281,889,773.70/280,064.80
  6. Step 6: Final answer
    x = 104,553.98

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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.