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Finding the Fourth Proportional to 92,040.40, 138,060.60 and 86,856.40

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Solution

The fourth proportional to 92,040.40, 138,060.60 and 86,856.40 is: 130,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,040.40 : 138,060.60 = 86,856.40 : x
  2. Step 2: Convert to fraction form
    92,040.40/138,060.60 = 86,856.40/x
  3. Step 3: Cross multiply
    92,040.40x = 138,060.60 × 86,856.40
  4. Step 4: Simplify right side
    92,040.40x = 11,991,446,697.84
  5. Step 5: Solve for x
    x = 11,991,446,697.84/92,040.40
  6. Step 6: Final answer
    x = 130,284.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.