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Finding the Fourth Proportional to 92,027.80, 138,041.70 and 81,530.20

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Solution

The fourth proportional to 92,027.80, 138,041.70 and 81,530.20 is: 122,295.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,027.80 : 138,041.70 = 81,530.20 : x
  2. Step 2: Convert to fraction form
    92,027.80/138,041.70 = 81,530.20/x
  3. Step 3: Cross multiply
    92,027.80x = 138,041.70 × 81,530.20
  4. Step 4: Simplify right side
    92,027.80x = 11,254,567,409.34
  5. Step 5: Solve for x
    x = 11,254,567,409.34/92,027.80
  6. Step 6: Final answer
    x = 122,295.30

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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.