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Finding the Fourth Proportional to 81,698.85, 112,740.93 and 47,709.24

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Solution

The fourth proportional to 81,698.85, 112,740.93 and 47,709.24 is: 65,836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,698.85 : 112,740.93 = 47,709.24 : x
  2. Step 2: Convert to fraction form
    81,698.85/112,740.93 = 47,709.24/x
  3. Step 3: Cross multiply
    81,698.85x = 112,740.93 × 47,709.24
  4. Step 4: Simplify right side
    81,698.85x = 5,378,784,087.19
  5. Step 5: Solve for x
    x = 5,378,784,087.19/81,698.85
  6. Step 6: Final answer
    x = 65,836.72

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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.