Home / 81,090.40-121,665.84-49,565.20

Finding the Fourth Proportional to 81,090.40, 121,665.84 and 49,565.20

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Solution

The fourth proportional to 81,090.40, 121,665.84 and 49,565.20 is: 74,366.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.40 : 121,665.84 = 49,565.20 : x
  2. Step 2: Convert to fraction form
    81,090.40/121,665.84 = 49,565.20/x
  3. Step 3: Cross multiply
    81,090.40x = 121,665.84 × 49,565.20
  4. Step 4: Simplify right side
    81,090.40x = 6,030,391,692.77
  5. Step 5: Solve for x
    x = 6,030,391,692.77/81,090.40
  6. Step 6: Final answer
    x = 74,366.28

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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.