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Finding the Fourth Proportional to 85,065.64, 117,390.63 and 49,257.55

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Solution

The fourth proportional to 85,065.64, 117,390.63 and 49,257.55 is: 67,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,065.64 : 117,390.63 = 49,257.55 : x
  2. Step 2: Convert to fraction form
    85,065.64/117,390.63 = 49,257.55/x
  3. Step 3: Cross multiply
    85,065.64x = 117,390.63 × 49,257.55
  4. Step 4: Simplify right side
    85,065.64x = 5,782,374,826.76
  5. Step 5: Solve for x
    x = 5,782,374,826.76/85,065.64
  6. Step 6: Final answer
    x = 67,975.45

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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.