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Finding the Fourth Proportional to 210,690.57, 290,750.99 and 115,196.25

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Solution

The fourth proportional to 210,690.57, 290,750.99 and 115,196.25 is: 158,969.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,690.57 : 290,750.99 = 115,196.25 : x
  2. Step 2: Convert to fraction form
    210,690.57/290,750.99 = 115,196.25/x
  3. Step 3: Cross multiply
    210,690.57x = 290,750.99 × 115,196.25
  4. Step 4: Simplify right side
    210,690.57x = 33,493,423,731.79
  5. Step 5: Solve for x
    x = 33,493,423,731.79/210,690.57
  6. Step 6: Final answer
    x = 158,969.73

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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.