Home / 85,591.35-128,417.40-38,202.12

Finding the Fourth Proportional to 85,591.35, 128,417.40 and 38,202.12

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Solution

The fourth proportional to 85,591.35, 128,417.40 and 38,202.12 is: 57,316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,591.35 : 128,417.40 = 38,202.12 : x
  2. Step 2: Convert to fraction form
    85,591.35/128,417.40 = 38,202.12/x
  3. Step 3: Cross multiply
    85,591.35x = 128,417.40 × 38,202.12
  4. Step 4: Simplify right side
    85,591.35x = 4,905,816,924.89
  5. Step 5: Solve for x
    x = 4,905,816,924.89/85,591.35
  6. Step 6: Final answer
    x = 57,316.74

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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.