Home / 78,650.33-108,539.12-42,840.26

Finding the Fourth Proportional to 78,650.33, 108,539.12 and 42,840.26

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Solution

The fourth proportional to 78,650.33, 108,539.12 and 42,840.26 is: 59,120.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,650.33 : 108,539.12 = 42,840.26 : x
  2. Step 2: Convert to fraction form
    78,650.33/108,539.12 = 42,840.26/x
  3. Step 3: Cross multiply
    78,650.33x = 108,539.12 × 42,840.26
  4. Step 4: Simplify right side
    78,650.33x = 4,649,843,364.07
  5. Step 5: Solve for x
    x = 4,649,843,364.07/78,650.33
  6. Step 6: Final answer
    x = 59,120.46

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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.