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Finding the Fourth Proportional to 109,305.55, 163,958.35 and 84,381.98

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Solution

The fourth proportional to 109,305.55, 163,958.35 and 84,381.98 is: 126,573.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,305.55 : 163,958.35 = 84,381.98 : x
  2. Step 2: Convert to fraction form
    109,305.55/163,958.35 = 84,381.98/x
  3. Step 3: Cross multiply
    109,305.55x = 163,958.35 × 84,381.98
  4. Step 4: Simplify right side
    109,305.55x = 13,835,130,210.53
  5. Step 5: Solve for x
    x = 13,835,130,210.53/109,305.55
  6. Step 6: Final answer
    x = 126,573.00

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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.