Home / 109,128.20-163,692.30-72,192.20

Finding the Fourth Proportional to 109,128.20, 163,692.30 and 72,192.20

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Solution

The fourth proportional to 109,128.20, 163,692.30 and 72,192.20 is: 108,288.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,128.20 : 163,692.30 = 72,192.20 : x
  2. Step 2: Convert to fraction form
    109,128.20/163,692.30 = 72,192.20/x
  3. Step 3: Cross multiply
    109,128.20x = 163,692.30 × 72,192.20
  4. Step 4: Simplify right side
    109,128.20x = 11,817,307,260.06
  5. Step 5: Solve for x
    x = 11,817,307,260.06/109,128.20
  6. Step 6: Final answer
    x = 108,288.30

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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.