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Finding the Fourth Proportional to 210,371.65, 290,323.76 and 128,674.30

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Solution

The fourth proportional to 210,371.65, 290,323.76 and 128,674.30 is: 177,577.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,371.65 : 290,323.76 = 128,674.30 : x
  2. Step 2: Convert to fraction form
    210,371.65/290,323.76 = 128,674.30/x
  3. Step 3: Cross multiply
    210,371.65x = 290,323.76 × 128,674.30
  4. Step 4: Simplify right side
    210,371.65x = 37,357,206,591.37
  5. Step 5: Solve for x
    x = 37,357,206,591.37/210,371.65
  6. Step 6: Final answer
    x = 177,577.19

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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.