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Finding the Fourth Proportional to 280,010.81, 420,015.38 and 69,648.75

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Solution

The fourth proportional to 280,010.81, 420,015.38 and 69,648.75 is: 104,472.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,010.81 : 420,015.38 = 69,648.75 : x
  2. Step 2: Convert to fraction form
    280,010.81/420,015.38 = 69,648.75/x
  3. Step 3: Cross multiply
    280,010.81x = 420,015.38 × 69,648.75
  4. Step 4: Simplify right side
    280,010.81x = 29,253,545,849.53
  5. Step 5: Solve for x
    x = 29,253,545,849.53/280,010.81
  6. Step 6: Final answer
    x = 104,472.92

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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.