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Finding the Fourth Proportional to 250,395.81, 345,665.88 and 142,945.05

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Solution

The fourth proportional to 250,395.81, 345,665.88 and 142,945.05 is: 197,332.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,395.81 : 345,665.88 = 142,945.05 : x
  2. Step 2: Convert to fraction form
    250,395.81/345,665.88 = 142,945.05/x
  3. Step 3: Cross multiply
    250,395.81x = 345,665.88 × 142,945.05
  4. Step 4: Simplify right side
    250,395.81x = 49,411,227,796.14
  5. Step 5: Solve for x
    x = 49,411,227,796.14/250,395.81
  6. Step 6: Final answer
    x = 197,332.49

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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.