Home / 210,749.28-290,842.02-120,119.55

Finding the Fourth Proportional to 210,749.28, 290,842.02 and 120,119.55

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Solution

The fourth proportional to 210,749.28, 290,842.02 and 120,119.55 is: 165,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,749.28 : 290,842.02 = 120,119.55 : x
  2. Step 2: Convert to fraction form
    210,749.28/290,842.02 = 120,119.55/x
  3. Step 3: Cross multiply
    210,749.28x = 290,842.02 × 120,119.55
  4. Step 4: Simplify right side
    210,749.28x = 34,935,812,563.49
  5. Step 5: Solve for x
    x = 34,935,812,563.49/210,749.28
  6. Step 6: Final answer
    x = 165,769.55

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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.