Home / 81,299.40-121,985.55-36,903.30

Finding the Fourth Proportional to 81,299.40, 121,985.55 and 36,903.30

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Solution

The fourth proportional to 81,299.40, 121,985.55 and 36,903.30 is: 55,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,299.40 : 121,985.55 = 36,903.30 : x
  2. Step 2: Convert to fraction form
    81,299.40/121,985.55 = 36,903.30/x
  3. Step 3: Cross multiply
    81,299.40x = 121,985.55 × 36,903.30
  4. Step 4: Simplify right side
    81,299.40x = 4,501,669,347.32
  5. Step 5: Solve for x
    x = 4,501,669,347.32/81,299.40
  6. Step 6: Final answer
    x = 55,371.50

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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.