Home / 85,717.98-128,607.21-38,328.66

Finding the Fourth Proportional to 85,717.98, 128,607.21 and 38,328.66

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Solution

The fourth proportional to 85,717.98, 128,607.21 and 38,328.66 is: 57,506.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,717.98 : 128,607.21 = 38,328.66 : x
  2. Step 2: Convert to fraction form
    85,717.98/128,607.21 = 38,328.66/x
  3. Step 3: Cross multiply
    85,717.98x = 128,607.21 × 38,328.66
  4. Step 4: Simplify right side
    85,717.98x = 4,929,342,025.64
  5. Step 5: Solve for x
    x = 4,929,342,025.64/85,717.98
  6. Step 6: Final answer
    x = 57,506.51

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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.