Home / 78,611.36-108,485.63-42,803.34

Finding the Fourth Proportional to 78,611.36, 108,485.63 and 42,803.34

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Solution

The fourth proportional to 78,611.36, 108,485.63 and 42,803.34 is: 59,069.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,611.36 : 108,485.63 = 42,803.34 : x
  2. Step 2: Convert to fraction form
    78,611.36/108,485.63 = 42,803.34/x
  3. Step 3: Cross multiply
    78,611.36x = 108,485.63 × 42,803.34
  4. Step 4: Simplify right side
    78,611.36x = 4,643,546,845.68
  5. Step 5: Solve for x
    x = 4,643,546,845.68/78,611.36
  6. Step 6: Final answer
    x = 59,069.67

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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.