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Finding the Fourth Proportional to 86,230.60, 129,078.60 and 46,689.64

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Solution

The fourth proportional to 86,230.60, 129,078.60 and 46,689.64 is: 69,889.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,230.60 : 129,078.60 = 46,689.64 : x
  2. Step 2: Convert to fraction form
    86,230.60/129,078.60 = 46,689.64/x
  3. Step 3: Cross multiply
    86,230.60x = 129,078.60 × 46,689.64
  4. Step 4: Simplify right side
    86,230.60x = 6,026,633,365.70
  5. Step 5: Solve for x
    x = 6,026,633,365.70/86,230.60
  6. Step 6: Final answer
    x = 69,889.73

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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.