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Finding the Fourth Proportional to 190,402.85, 285,303.87 and 70,294.64

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Solution

The fourth proportional to 190,402.85, 285,303.87 and 70,294.64 is: 105,331.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,402.85 : 285,303.87 = 70,294.64 : x
  2. Step 2: Convert to fraction form
    190,402.85/285,303.87 = 70,294.64/x
  3. Step 3: Cross multiply
    190,402.85x = 285,303.87 × 70,294.64
  4. Step 4: Simplify right side
    190,402.85x = 20,055,331,405.74
  5. Step 5: Solve for x
    x = 20,055,331,405.74/190,402.85
  6. Step 6: Final answer
    x = 105,331.04

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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.