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Finding the Fourth Proportional to 105,645.60, 158,468.40 and 66,279.60

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Solution

The fourth proportional to 105,645.60, 158,468.40 and 66,279.60 is: 99,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,645.60 : 158,468.40 = 66,279.60 : x
  2. Step 2: Convert to fraction form
    105,645.60/158,468.40 = 66,279.60/x
  3. Step 3: Cross multiply
    105,645.60x = 158,468.40 × 66,279.60
  4. Step 4: Simplify right side
    105,645.60x = 10,503,222,164.64
  5. Step 5: Solve for x
    x = 10,503,222,164.64/105,645.60
  6. Step 6: Final answer
    x = 99,419.40

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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.