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Finding the Fourth Proportional to 85,466.80, 128,200.20 and 57,473.20

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Solution

The fourth proportional to 85,466.80, 128,200.20 and 57,473.20 is: 86,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,466.80 : 128,200.20 = 57,473.20 : x
  2. Step 2: Convert to fraction form
    85,466.80/128,200.20 = 57,473.20/x
  3. Step 3: Cross multiply
    85,466.80x = 128,200.20 × 57,473.20
  4. Step 4: Simplify right side
    85,466.80x = 7,368,075,734.64
  5. Step 5: Solve for x
    x = 7,368,075,734.64/85,466.80
  6. Step 6: Final answer
    x = 86,209.80

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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.