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Finding the Fourth Proportional to 154,145.63, 212,720.89 and 90,483.42

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Solution

The fourth proportional to 154,145.63, 212,720.89 and 90,483.42 is: 124,867.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,145.63 : 212,720.89 = 90,483.42 : x
  2. Step 2: Convert to fraction form
    154,145.63/212,720.89 = 90,483.42/x
  3. Step 3: Cross multiply
    154,145.63x = 212,720.89 × 90,483.42
  4. Step 4: Simplify right side
    154,145.63x = 19,247,713,632.64
  5. Step 5: Solve for x
    x = 19,247,713,632.64/154,145.63
  6. Step 6: Final answer
    x = 124,867.07

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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.