Home / 78,245.55-117,338.85-28,313.30

Finding the Fourth Proportional to 78,245.55, 117,338.85 and 28,313.30

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Solution

The fourth proportional to 78,245.55, 117,338.85 and 28,313.30 is: 42,459.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,245.55 : 117,338.85 = 28,313.30 : x
  2. Step 2: Convert to fraction form
    78,245.55/117,338.85 = 28,313.30/x
  3. Step 3: Cross multiply
    78,245.55x = 117,338.85 × 28,313.30
  4. Step 4: Simplify right side
    78,245.55x = 3,322,249,475.01
  5. Step 5: Solve for x
    x = 3,322,249,475.01/78,245.55
  6. Step 6: Final answer
    x = 42,459.28

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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.