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Finding the Fourth Proportional to 109,392.87, 163,870.43 and 86,941.43

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Solution

The fourth proportional to 109,392.87, 163,870.43 and 86,941.43 is: 130,238.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,392.87 : 163,870.43 = 86,941.43 : x
  2. Step 2: Convert to fraction form
    109,392.87/163,870.43 = 86,941.43/x
  3. Step 3: Cross multiply
    109,392.87x = 163,870.43 × 86,941.43
  4. Step 4: Simplify right side
    109,392.87x = 14,247,129,493.88
  5. Step 5: Solve for x
    x = 14,247,129,493.88/109,392.87
  6. Step 6: Final answer
    x = 130,238.19

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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.