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Finding the Fourth Proportional to 280,014.98, 420,021.68 and 69,652.94

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Solution

The fourth proportional to 280,014.98, 420,021.68 and 69,652.94 is: 104,479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,014.98 : 420,021.68 = 69,652.94 : x
  2. Step 2: Convert to fraction form
    280,014.98/420,021.68 = 69,652.94/x
  3. Step 3: Cross multiply
    280,014.98x = 420,021.68 × 69,652.94
  4. Step 4: Simplify right side
    280,014.98x = 29,255,744,875.74
  5. Step 5: Solve for x
    x = 29,255,744,875.74/280,014.98
  6. Step 6: Final answer
    x = 104,479.21

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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.