Home / 78,739.56-118,189.98-61,399.08

Finding the Fourth Proportional to 78,739.56, 118,189.98 and 61,399.08

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Solution

The fourth proportional to 78,739.56, 118,189.98 and 61,399.08 is: 92,161.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.56 : 118,189.98 = 61,399.08 : x
  2. Step 2: Convert to fraction form
    78,739.56/118,189.98 = 61,399.08/x
  3. Step 3: Cross multiply
    78,739.56x = 118,189.98 × 61,399.08
  4. Step 4: Simplify right side
    78,739.56x = 7,256,756,037.22
  5. Step 5: Solve for x
    x = 7,256,756,037.22/78,739.56
  6. Step 6: Final answer
    x = 92,161.50

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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.