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Finding the Fourth Proportional to 121,611.60, 182,417.40 and 74,955.60

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Solution

The fourth proportional to 121,611.60, 182,417.40 and 74,955.60 is: 112,433.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,611.60 : 182,417.40 = 74,955.60 : x
  2. Step 2: Convert to fraction form
    121,611.60/182,417.40 = 74,955.60/x
  3. Step 3: Cross multiply
    121,611.60x = 182,417.40 × 74,955.60
  4. Step 4: Simplify right side
    121,611.60x = 13,673,205,667.44
  5. Step 5: Solve for x
    x = 13,673,205,667.44/121,611.60
  6. Step 6: Final answer
    x = 112,433.40

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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.