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Finding the Fourth Proportional to 128,303.44, 177,059.40 and 71,713.60

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Solution

The fourth proportional to 128,303.44, 177,059.40 and 71,713.60 is: 98,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.44 : 177,059.40 = 71,713.60 : x
  2. Step 2: Convert to fraction form
    128,303.44/177,059.40 = 71,713.60/x
  3. Step 3: Cross multiply
    128,303.44x = 177,059.40 × 71,713.60
  4. Step 4: Simplify right side
    128,303.44x = 12,697,566,987.84
  5. Step 5: Solve for x
    x = 12,697,566,987.84/128,303.44
  6. Step 6: Final answer
    x = 98,965.13

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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.