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Finding the Fourth Proportional to 66,494.40, 99,740.79 and 19,110.60

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Solution

The fourth proportional to 66,494.40, 99,740.79 and 19,110.60 is: 28,665.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,494.40 : 99,740.79 = 19,110.60 : x
  2. Step 2: Convert to fraction form
    66,494.40/99,740.79 = 19,110.60/x
  3. Step 3: Cross multiply
    66,494.40x = 99,740.79 × 19,110.60
  4. Step 4: Simplify right side
    66,494.40x = 1,906,106,341.37
  5. Step 5: Solve for x
    x = 1,906,106,341.37/66,494.40
  6. Step 6: Final answer
    x = 28,665.67

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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.