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Finding the Fourth Proportional to 154,649.50, 213,412.70 and 90,991.42

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Solution

The fourth proportional to 154,649.50, 213,412.70 and 90,991.42 is: 125,566.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,649.50 : 213,412.70 = 90,991.42 : x
  2. Step 2: Convert to fraction form
    154,649.50/213,412.70 = 90,991.42/x
  3. Step 3: Cross multiply
    154,649.50x = 213,412.70 × 90,991.42
  4. Step 4: Simplify right side
    154,649.50x = 19,418,724,619.03
  5. Step 5: Solve for x
    x = 19,418,724,619.03/154,649.50
  6. Step 6: Final answer
    x = 125,566.04

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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.