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Finding the Fourth Proportional to 121,920.60, 182,880.90 and 106,368.60

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Solution

The fourth proportional to 121,920.60, 182,880.90 and 106,368.60 is: 159,552.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,920.60 : 182,880.90 = 106,368.60 : x
  2. Step 2: Convert to fraction form
    121,920.60/182,880.90 = 106,368.60/x
  3. Step 3: Cross multiply
    121,920.60x = 182,880.90 × 106,368.60
  4. Step 4: Simplify right side
    121,920.60x = 19,452,785,299.74
  5. Step 5: Solve for x
    x = 19,452,785,299.74/121,920.60
  6. Step 6: Final answer
    x = 159,552.90

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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.