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Finding the Fourth Proportional to 128,301.44, 177,056.64 and 71,711.60

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Solution

The fourth proportional to 128,301.44, 177,056.64 and 71,711.60 is: 98,962.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.44 : 177,056.64 = 71,711.60 : x
  2. Step 2: Convert to fraction form
    128,301.44/177,056.64 = 71,711.60/x
  3. Step 3: Cross multiply
    128,301.44x = 177,056.64 × 71,711.60
  4. Step 4: Simplify right side
    128,301.44x = 12,697,014,945.02
  5. Step 5: Solve for x
    x = 12,697,014,945.02/128,301.44
  6. Step 6: Final answer
    x = 98,962.37

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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.