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Finding the Fourth Proportional to 154,680.25, 213,458.76 and 87,612.25

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Solution

The fourth proportional to 154,680.25, 213,458.76 and 87,612.25 is: 120,904.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,680.25 : 213,458.76 = 87,612.25 : x
  2. Step 2: Convert to fraction form
    154,680.25/213,458.76 = 87,612.25/x
  3. Step 3: Cross multiply
    154,680.25x = 213,458.76 × 87,612.25
  4. Step 4: Simplify right side
    154,680.25x = 18,701,602,245.81
  5. Step 5: Solve for x
    x = 18,701,602,245.81/154,680.25
  6. Step 6: Final answer
    x = 120,904.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.