Home / 85,683.30-128,560.50-52,404.54

Finding the Fourth Proportional to 85,683.30, 128,560.50 and 52,404.54

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Solution

The fourth proportional to 85,683.30, 128,560.50 and 52,404.54 is: 78,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,683.30 : 128,560.50 = 52,404.54 : x
  2. Step 2: Convert to fraction form
    85,683.30/128,560.50 = 52,404.54/x
  3. Step 3: Cross multiply
    85,683.30x = 128,560.50 × 52,404.54
  4. Step 4: Simplify right side
    85,683.30x = 6,737,153,864.67
  5. Step 5: Solve for x
    x = 6,737,153,864.67/85,683.30
  6. Step 6: Final answer
    x = 78,628.55

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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.