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Finding the Fourth Proportional to 130,607.36, 180,186.36 and 85,270.88

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Solution

The fourth proportional to 130,607.36, 180,186.36 and 85,270.88 is: 117,640.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,607.36 : 180,186.36 = 85,270.88 : x
  2. Step 2: Convert to fraction form
    130,607.36/180,186.36 = 85,270.88/x
  3. Step 3: Cross multiply
    130,607.36x = 180,186.36 × 85,270.88
  4. Step 4: Simplify right side
    130,607.36x = 15,364,649,481.20
  5. Step 5: Solve for x
    x = 15,364,649,481.20/130,607.36
  6. Step 6: Final answer
    x = 117,640.00

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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.