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Finding the Fourth Proportional to 154,357.98, 212,924.79 and 90,682.62

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Solution

The fourth proportional to 154,357.98, 212,924.79 and 90,682.62 is: 125,089.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,357.98 : 212,924.79 = 90,682.62 : x
  2. Step 2: Convert to fraction form
    154,357.98/212,924.79 = 90,682.62/x
  3. Step 3: Cross multiply
    154,357.98x = 212,924.79 × 90,682.62
  4. Step 4: Simplify right side
    154,357.98x = 19,308,577,820.15
  5. Step 5: Solve for x
    x = 19,308,577,820.15/154,357.98
  6. Step 6: Final answer
    x = 125,089.60

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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.