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Finding the Fourth Proportional to 181,389.90, 250,387.83 and 120,938.45

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Solution

The fourth proportional to 181,389.90, 250,387.83 and 120,938.45 is: 166,941.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,389.90 : 250,387.83 = 120,938.45 : x
  2. Step 2: Convert to fraction form
    181,389.90/250,387.83 = 120,938.45/x
  3. Step 3: Cross multiply
    181,389.90x = 250,387.83 × 120,938.45
  4. Step 4: Simplify right side
    181,389.90x = 30,281,515,454.37
  5. Step 5: Solve for x
    x = 30,281,515,454.37/181,389.90
  6. Step 6: Final answer
    x = 166,941.57

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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.