Home / 78,690.12-108,579.66-46,858.20

Finding the Fourth Proportional to 78,690.12, 108,579.66 and 46,858.20

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Solution

The fourth proportional to 78,690.12, 108,579.66 and 46,858.20 is: 64,656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.12 : 108,579.66 = 46,858.20 : x
  2. Step 2: Convert to fraction form
    78,690.12/108,579.66 = 46,858.20/x
  3. Step 3: Cross multiply
    78,690.12x = 108,579.66 × 46,858.20
  4. Step 4: Simplify right side
    78,690.12x = 5,087,847,424.21
  5. Step 5: Solve for x
    x = 5,087,847,424.21/78,690.12
  6. Step 6: Final answer
    x = 64,656.75

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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.