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Finding the Fourth Proportional to 81,309.93, 121,807.08 and 59,923.80

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Solution

The fourth proportional to 81,309.93, 121,807.08 and 59,923.80 is: 89,769.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,309.93 : 121,807.08 = 59,923.80 : x
  2. Step 2: Convert to fraction form
    81,309.93/121,807.08 = 59,923.80/x
  3. Step 3: Cross multiply
    81,309.93x = 121,807.08 × 59,923.80
  4. Step 4: Simplify right side
    81,309.93x = 7,299,143,100.50
  5. Step 5: Solve for x
    x = 7,299,143,100.50/81,309.93
  6. Step 6: Final answer
    x = 89,769.39

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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.