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Finding the Fourth Proportional to 121,315.60, 182,005.80 and 108,258.40

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Solution

The fourth proportional to 121,315.60, 182,005.80 and 108,258.40 is: 162,416.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,315.60 : 182,005.80 = 108,258.40 : x
  2. Step 2: Convert to fraction form
    121,315.60/182,005.80 = 108,258.40/x
  3. Step 3: Cross multiply
    121,315.60x = 182,005.80 × 108,258.40
  4. Step 4: Simplify right side
    121,315.60x = 19,703,656,698.72
  5. Step 5: Solve for x
    x = 19,703,656,698.72/121,315.60
  6. Step 6: Final answer
    x = 162,416.51

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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.