Home / 85,787.98-128,650.38-29,613.76

Finding the Fourth Proportional to 85,787.98, 128,650.38 and 29,613.76

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Solution

The fourth proportional to 85,787.98, 128,650.38 and 29,613.76 is: 44,409.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,787.98 : 128,650.38 = 29,613.76 : x
  2. Step 2: Convert to fraction form
    85,787.98/128,650.38 = 29,613.76/x
  3. Step 3: Cross multiply
    85,787.98x = 128,650.38 × 29,613.76
  4. Step 4: Simplify right side
    85,787.98x = 3,809,821,477.23
  5. Step 5: Solve for x
    x = 3,809,821,477.23/85,787.98
  6. Step 6: Final answer
    x = 44,409.74

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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.