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Finding the Fourth Proportional to 154,640.76, 213,384.30 and 90,955.32

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Solution

The fourth proportional to 154,640.76, 213,384.30 and 90,955.32 is: 125,506.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,640.76 : 213,384.30 = 90,955.32 : x
  2. Step 2: Convert to fraction form
    154,640.76/213,384.30 = 90,955.32/x
  3. Step 3: Cross multiply
    154,640.76x = 213,384.30 × 90,955.32
  4. Step 4: Simplify right side
    154,640.76x = 19,408,437,289.48
  5. Step 5: Solve for x
    x = 19,408,437,289.48/154,640.76
  6. Step 6: Final answer
    x = 125,506.61

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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.