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Finding the Fourth Proportional to 128,749.98, 177,452.63 and 85,652.38

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Solution

The fourth proportional to 128,749.98, 177,452.63 and 85,652.38 is: 118,052.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.98 : 177,452.63 = 85,652.38 : x
  2. Step 2: Convert to fraction form
    128,749.98/177,452.63 = 85,652.38/x
  3. Step 3: Cross multiply
    128,749.98x = 177,452.63 × 85,652.38
  4. Step 4: Simplify right side
    128,749.98x = 15,199,240,096.76
  5. Step 5: Solve for x
    x = 15,199,240,096.76/128,749.98
  6. Step 6: Final answer
    x = 118,052.37

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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.