Home / 85,699.85-128,576.05-38,354.81

Finding the Fourth Proportional to 85,699.85, 128,576.05 and 38,354.81

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Solution

The fourth proportional to 85,699.85, 128,576.05 and 38,354.81 is: 57,543.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,699.85 : 128,576.05 = 38,354.81 : x
  2. Step 2: Convert to fraction form
    85,699.85/128,576.05 = 38,354.81/x
  3. Step 3: Cross multiply
    85,699.85x = 128,576.05 × 38,354.81
  4. Step 4: Simplify right side
    85,699.85x = 4,931,509,229.53
  5. Step 5: Solve for x
    x = 4,931,509,229.53/85,699.85
  6. Step 6: Final answer
    x = 57,543.97

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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.