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Finding the Fourth Proportional to 107,485.74, 148,291.02 and 65,028.78

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Solution

The fourth proportional to 107,485.74, 148,291.02 and 65,028.78 is: 89,715.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,485.74 : 148,291.02 = 65,028.78 : x
  2. Step 2: Convert to fraction form
    107,485.74/148,291.02 = 65,028.78/x
  3. Step 3: Cross multiply
    107,485.74x = 148,291.02 × 65,028.78
  4. Step 4: Simplify right side
    107,485.74x = 9,643,184,115.56
  5. Step 5: Solve for x
    x = 9,643,184,115.56/107,485.74
  6. Step 6: Final answer
    x = 89,715.94

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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.