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Finding the Fourth Proportional to 103,783.56, 143,211.60 and 61,333.80

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Solution

The fourth proportional to 103,783.56, 143,211.60 and 61,333.80 is: 84,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,783.56 : 143,211.60 = 61,333.80 : x
  2. Step 2: Convert to fraction form
    103,783.56/143,211.60 = 61,333.80/x
  3. Step 3: Cross multiply
    103,783.56x = 143,211.60 × 61,333.80
  4. Step 4: Simplify right side
    103,783.56x = 8,783,711,632.08
  5. Step 5: Solve for x
    x = 8,783,711,632.08/103,783.56
  6. Step 6: Final answer
    x = 84,634.90

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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.