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Finding the Fourth Proportional to 57,785.40, 86,678.10 and 57,785.40

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Solution

The fourth proportional to 57,785.40, 86,678.10 and 57,785.40 is: 86,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,785.40 : 86,678.10 = 57,785.40 : x
  2. Step 2: Convert to fraction form
    57,785.40/86,678.10 = 57,785.40/x
  3. Step 3: Cross multiply
    57,785.40x = 86,678.10 × 57,785.40
  4. Step 4: Simplify right side
    57,785.40x = 5,008,728,679.74
  5. Step 5: Solve for x
    x = 5,008,728,679.74/57,785.40
  6. Step 6: Final answer
    x = 86,678.10

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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.