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Finding the Fourth Proportional to 128,675.62, 193,041.15 and 39,927.38

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Solution

The fourth proportional to 128,675.62, 193,041.15 and 39,927.38 is: 59,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.62 : 193,041.15 = 39,927.38 : x
  2. Step 2: Convert to fraction form
    128,675.62/193,041.15 = 39,927.38/x
  3. Step 3: Cross multiply
    128,675.62x = 193,041.15 × 39,927.38
  4. Step 4: Simplify right side
    128,675.62x = 7,707,627,351.69
  5. Step 5: Solve for x
    x = 7,707,627,351.69/128,675.62
  6. Step 6: Final answer
    x = 59,899.67

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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.