Home / 81,040.64-111,847.68-58,438.40

Finding the Fourth Proportional to 81,040.64, 111,847.68 and 58,438.40

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Solution

The fourth proportional to 81,040.64, 111,847.68 and 58,438.40 is: 80,653.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.64 : 111,847.68 = 58,438.40 : x
  2. Step 2: Convert to fraction form
    81,040.64/111,847.68 = 58,438.40/x
  3. Step 3: Cross multiply
    81,040.64x = 111,847.68 × 58,438.40
  4. Step 4: Simplify right side
    81,040.64x = 6,536,199,462.91
  5. Step 5: Solve for x
    x = 6,536,199,462.91/81,040.64
  6. Step 6: Final answer
    x = 80,653.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.