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Finding the Fourth Proportional to 210,574.35, 290,591.96 and 115,081.05

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Solution

The fourth proportional to 210,574.35, 290,591.96 and 115,081.05 is: 158,811.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,574.35 : 290,591.96 = 115,081.05 : x
  2. Step 2: Convert to fraction form
    210,574.35/290,591.96 = 115,081.05/x
  3. Step 3: Cross multiply
    210,574.35x = 290,591.96 × 115,081.05
  4. Step 4: Simplify right side
    210,574.35x = 33,441,627,878.36
  5. Step 5: Solve for x
    x = 33,441,627,878.36/210,574.35
  6. Step 6: Final answer
    x = 158,811.50

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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.