Home / 65,500.20-98,250.30-21,128.40

Finding the Fourth Proportional to 65,500.20, 98,250.30 and 21,128.40

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Solution

The fourth proportional to 65,500.20, 98,250.30 and 21,128.40 is: 31,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,500.20 : 98,250.30 = 21,128.40 : x
  2. Step 2: Convert to fraction form
    65,500.20/98,250.30 = 21,128.40/x
  3. Step 3: Cross multiply
    65,500.20x = 98,250.30 × 21,128.40
  4. Step 4: Simplify right side
    65,500.20x = 2,075,871,638.52
  5. Step 5: Solve for x
    x = 2,075,871,638.52/65,500.20
  6. Step 6: Final answer
    x = 31,692.60

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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.