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Finding the Fourth Proportional to 81,011.99, 121,482.55 and 43,053.01

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Solution

The fourth proportional to 81,011.99, 121,482.55 and 43,053.01 is: 64,560.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,011.99 : 121,482.55 = 43,053.01 : x
  2. Step 2: Convert to fraction form
    81,011.99/121,482.55 = 43,053.01/x
  3. Step 3: Cross multiply
    81,011.99x = 121,482.55 × 43,053.01
  4. Step 4: Simplify right side
    81,011.99x = 5,230,189,190.09
  5. Step 5: Solve for x
    x = 5,230,189,190.09/81,011.99
  6. Step 6: Final answer
    x = 64,560.68

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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.