Home / 210,027.40-289,812.02-128,396.72

Finding the Fourth Proportional to 210,027.40, 289,812.02 and 128,396.72

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Solution

The fourth proportional to 210,027.40, 289,812.02 and 128,396.72 is: 177,171.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,027.40 : 289,812.02 = 128,396.72 : x
  2. Step 2: Convert to fraction form
    210,027.40/289,812.02 = 128,396.72/x
  3. Step 3: Cross multiply
    210,027.40x = 289,812.02 × 128,396.72
  4. Step 4: Simplify right side
    210,027.40x = 37,210,912,784.57
  5. Step 5: Solve for x
    x = 37,210,912,784.57/210,027.40
  6. Step 6: Final answer
    x = 177,171.71

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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.