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Finding the Fourth Proportional to 109,210.80, 163,821.60 and 56,722.80

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Solution

The fourth proportional to 109,210.80, 163,821.60 and 56,722.80 is: 85,087.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,210.80 : 163,821.60 = 56,722.80 : x
  2. Step 2: Convert to fraction form
    109,210.80/163,821.60 = 56,722.80/x
  3. Step 3: Cross multiply
    109,210.80x = 163,821.60 × 56,722.80
  4. Step 4: Simplify right side
    109,210.80x = 9,292,419,852.48
  5. Step 5: Solve for x
    x = 9,292,419,852.48/109,210.80
  6. Step 6: Final answer
    x = 85,087.00

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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.