Home / 210,697.55-290,841.68-138,105.12

Finding the Fourth Proportional to 210,697.55, 290,841.68 and 138,105.12

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Solution

The fourth proportional to 210,697.55, 290,841.68 and 138,105.12 is: 190,636.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,697.55 : 290,841.68 = 138,105.12 : x
  2. Step 2: Convert to fraction form
    210,697.55/290,841.68 = 138,105.12/x
  3. Step 3: Cross multiply
    210,697.55x = 290,841.68 × 138,105.12
  4. Step 4: Simplify right side
    210,697.55x = 40,166,724,008.46
  5. Step 5: Solve for x
    x = 40,166,724,008.46/210,697.55
  6. Step 6: Final answer
    x = 190,636.88

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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.