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Finding the Fourth Proportional to 210,666.44, 290,720.72 and 115,173.14

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Solution

The fourth proportional to 210,666.44, 290,720.72 and 115,173.14 is: 158,939.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,666.44 : 290,720.72 = 115,173.14 : x
  2. Step 2: Convert to fraction form
    210,666.44/290,720.72 = 115,173.14/x
  3. Step 3: Cross multiply
    210,666.44x = 290,720.72 × 115,173.14
  4. Step 4: Simplify right side
    210,666.44x = 33,483,218,185.46
  5. Step 5: Solve for x
    x = 33,483,218,185.46/210,666.44
  6. Step 6: Final answer
    x = 158,939.50

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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.