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Finding the Fourth Proportional to 154,325.70, 212,922.81 and 90,627.30

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Solution

The fourth proportional to 154,325.70, 212,922.81 and 90,627.30 is: 125,038.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,325.70 : 212,922.81 = 90,627.30 : x
  2. Step 2: Convert to fraction form
    154,325.70/212,922.81 = 90,627.30/x
  3. Step 3: Cross multiply
    154,325.70x = 212,922.81 × 90,627.30
  4. Step 4: Simplify right side
    154,325.70x = 19,296,619,378.71
  5. Step 5: Solve for x
    x = 19,296,619,378.71/154,325.70
  6. Step 6: Final answer
    x = 125,038.28

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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.