Home / 111,840.38-154,280.88-66,486.10

Finding the Fourth Proportional to 111,840.38, 154,280.88 and 66,486.10

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Solution

The fourth proportional to 111,840.38, 154,280.88 and 66,486.10 is: 91,715.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,840.38 : 154,280.88 = 66,486.10 : x
  2. Step 2: Convert to fraction form
    111,840.38/154,280.88 = 66,486.10/x
  3. Step 3: Cross multiply
    111,840.38x = 154,280.88 × 66,486.10
  4. Step 4: Simplify right side
    111,840.38x = 10,257,534,015.77
  5. Step 5: Solve for x
    x = 10,257,534,015.77/111,840.38
  6. Step 6: Final answer
    x = 91,715.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.