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Finding the Fourth Proportional to 112,014.60, 168,021.90 and 86,645.40

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Solution

The fourth proportional to 112,014.60, 168,021.90 and 86,645.40 is: 129,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,014.60 : 168,021.90 = 86,645.40 : x
  2. Step 2: Convert to fraction form
    112,014.60/168,021.90 = 86,645.40/x
  3. Step 3: Cross multiply
    112,014.60x = 168,021.90 × 86,645.40
  4. Step 4: Simplify right side
    112,014.60x = 14,558,324,734.26
  5. Step 5: Solve for x
    x = 14,558,324,734.26/112,014.60
  6. Step 6: Final answer
    x = 129,968.10

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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.