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Finding the Fourth Proportional to 109,215.80, 163,829.10 and 56,727.80

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Solution

The fourth proportional to 109,215.80, 163,829.10 and 56,727.80 is: 85,094.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,215.80 : 163,829.10 = 56,727.80 : x
  2. Step 2: Convert to fraction form
    109,215.80/163,829.10 = 56,727.80/x
  3. Step 3: Cross multiply
    109,215.80x = 163,829.10 × 56,727.80
  4. Step 4: Simplify right side
    109,215.80x = 9,293,664,418.98
  5. Step 5: Solve for x
    x = 9,293,664,418.98/109,215.80
  6. Step 6: Final answer
    x = 85,094.50

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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.