Home / 78,633.09-117,379.60-72,779.49

Finding the Fourth Proportional to 78,633.09, 117,379.60 and 72,779.49

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Solution

The fourth proportional to 78,633.09, 117,379.60 and 72,779.49 is: 108,641.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,633.09 : 117,379.60 = 72,779.49 : x
  2. Step 2: Convert to fraction form
    78,633.09/117,379.60 = 72,779.49/x
  3. Step 3: Cross multiply
    78,633.09x = 117,379.60 × 72,779.49
  4. Step 4: Simplify right side
    78,633.09x = 8,542,827,242.46
  5. Step 5: Solve for x
    x = 8,542,827,242.46/78,633.09
  6. Step 6: Final answer
    x = 108,641.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.