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Finding the Fourth Proportional to 81,700.20, 122,550.30 and 46,643.40

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Solution

The fourth proportional to 81,700.20, 122,550.30 and 46,643.40 is: 69,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,700.20 : 122,550.30 = 46,643.40 : x
  2. Step 2: Convert to fraction form
    81,700.20/122,550.30 = 46,643.40/x
  3. Step 3: Cross multiply
    81,700.20x = 122,550.30 × 46,643.40
  4. Step 4: Simplify right side
    81,700.20x = 5,716,162,663.02
  5. Step 5: Solve for x
    x = 5,716,162,663.02/81,700.20
  6. Step 6: Final answer
    x = 69,965.10

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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.