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Finding the Fourth Proportional to 92,577.20, 138,865.80 and 86,745.20

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Solution

The fourth proportional to 92,577.20, 138,865.80 and 86,745.20 is: 130,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,577.20 : 138,865.80 = 86,745.20 : x
  2. Step 2: Convert to fraction form
    92,577.20/138,865.80 = 86,745.20/x
  3. Step 3: Cross multiply
    92,577.20x = 138,865.80 × 86,745.20
  4. Step 4: Simplify right side
    92,577.20x = 12,045,941,594.16
  5. Step 5: Solve for x
    x = 12,045,941,594.16/92,577.20
  6. Step 6: Final answer
    x = 130,117.80

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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.