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Finding the Fourth Proportional to 100,129.33, 150,028.12 and 70,401.92

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Solution

The fourth proportional to 100,129.33, 150,028.12 and 70,401.92 is: 105,486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,129.33 : 150,028.12 = 70,401.92 : x
  2. Step 2: Convert to fraction form
    100,129.33/150,028.12 = 70,401.92/x
  3. Step 3: Cross multiply
    100,129.33x = 150,028.12 × 70,401.92
  4. Step 4: Simplify right side
    100,129.33x = 10,562,267,701.99
  5. Step 5: Solve for x
    x = 10,562,267,701.99/100,129.33
  6. Step 6: Final answer
    x = 105,486.25

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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.