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Finding the Fourth Proportional to 128,069.63, 176,571.76 and 105,014.50

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Solution

The fourth proportional to 128,069.63, 176,571.76 and 105,014.50 is: 144,785.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,069.63 : 176,571.76 = 105,014.50 : x
  2. Step 2: Convert to fraction form
    128,069.63/176,571.76 = 105,014.50/x
  3. Step 3: Cross multiply
    128,069.63x = 176,571.76 × 105,014.50
  4. Step 4: Simplify right side
    128,069.63x = 18,542,595,090.52
  5. Step 5: Solve for x
    x = 18,542,595,090.52/128,069.63
  6. Step 6: Final answer
    x = 144,785.26

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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.