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Finding the Fourth Proportional to 190,035.99, 285,130.13 and 71,740.89

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Solution

The fourth proportional to 190,035.99, 285,130.13 and 71,740.89 is: 107,640.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,035.99 : 285,130.13 = 71,740.89 : x
  2. Step 2: Convert to fraction form
    190,035.99/285,130.13 = 71,740.89/x
  3. Step 3: Cross multiply
    190,035.99x = 285,130.13 × 71,740.89
  4. Step 4: Simplify right side
    190,035.99x = 20,455,488,933.31
  5. Step 5: Solve for x
    x = 20,455,488,933.31/190,035.99
  6. Step 6: Final answer
    x = 107,640.08

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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.