Home / 91,749.10-128,186.30-91,749.10

Finding the Fourth Proportional to 91,749.10, 128,186.30 and 91,749.10

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Solution

The fourth proportional to 91,749.10, 128,186.30 and 91,749.10 is: 128,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,749.10 : 128,186.30 = 91,749.10 : x
  2. Step 2: Convert to fraction form
    91,749.10/128,186.30 = 91,749.10/x
  3. Step 3: Cross multiply
    91,749.10x = 128,186.30 × 91,749.10
  4. Step 4: Simplify right side
    91,749.10x = 11,760,977,657.33
  5. Step 5: Solve for x
    x = 11,760,977,657.33/91,749.10
  6. Step 6: Final answer
    x = 128,186.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.