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Finding the Fourth Proportional to 121,629.60, 182,314.80 and 46,720.80

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Solution

The fourth proportional to 121,629.60, 182,314.80 and 46,720.80 is: 70,031.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,629.60 : 182,314.80 = 46,720.80 : x
  2. Step 2: Convert to fraction form
    121,629.60/182,314.80 = 46,720.80/x
  3. Step 3: Cross multiply
    121,629.60x = 182,314.80 × 46,720.80
  4. Step 4: Simplify right side
    121,629.60x = 8,517,893,307.84
  5. Step 5: Solve for x
    x = 8,517,893,307.84/121,629.60
  6. Step 6: Final answer
    x = 70,031.42

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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.