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Finding the Fourth Proportional to 85,722.40, 128,583.60 and 26,557.60

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Solution

The fourth proportional to 85,722.40, 128,583.60 and 26,557.60 is: 39,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,722.40 : 128,583.60 = 26,557.60 : x
  2. Step 2: Convert to fraction form
    85,722.40/128,583.60 = 26,557.60/x
  3. Step 3: Cross multiply
    85,722.40x = 128,583.60 × 26,557.60
  4. Step 4: Simplify right side
    85,722.40x = 3,414,871,815.36
  5. Step 5: Solve for x
    x = 3,414,871,815.36/85,722.40
  6. Step 6: Final answer
    x = 39,836.40

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Similar ratio
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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.