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Finding the Fourth Proportional to 85,235.60, 117,619.24 and 47,507.60

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Solution

The fourth proportional to 85,235.60, 117,619.24 and 47,507.60 is: 65,557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,235.60 : 117,619.24 = 47,507.60 : x
  2. Step 2: Convert to fraction form
    85,235.60/117,619.24 = 47,507.60/x
  3. Step 3: Cross multiply
    85,235.60x = 117,619.24 × 47,507.60
  4. Step 4: Simplify right side
    85,235.60x = 5,587,807,806.22
  5. Step 5: Solve for x
    x = 5,587,807,806.22/85,235.60
  6. Step 6: Final answer
    x = 65,557.21

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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.