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Finding the Fourth Proportional to 190,689.88, 285,994.32 and 72,319.72

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Solution

The fourth proportional to 190,689.88, 285,994.32 and 72,319.72 is: 108,464.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,689.88 : 285,994.32 = 72,319.72 : x
  2. Step 2: Convert to fraction form
    190,689.88/285,994.32 = 72,319.72/x
  3. Step 3: Cross multiply
    190,689.88x = 285,994.32 × 72,319.72
  4. Step 4: Simplify right side
    190,689.88x = 20,683,029,143.99
  5. Step 5: Solve for x
    x = 20,683,029,143.99/190,689.88
  6. Step 6: Final answer
    x = 108,464.22

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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.