Home / 81,271.14-121,955.16-36,289.02

Finding the Fourth Proportional to 81,271.14, 121,955.16 and 36,289.02

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Solution

The fourth proportional to 81,271.14, 121,955.16 and 36,289.02 is: 54,455.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,271.14 : 121,955.16 = 36,289.02 : x
  2. Step 2: Convert to fraction form
    81,271.14/121,955.16 = 36,289.02/x
  3. Step 3: Cross multiply
    81,271.14x = 121,955.16 × 36,289.02
  4. Step 4: Simplify right side
    81,271.14x = 4,425,633,240.34
  5. Step 5: Solve for x
    x = 4,425,633,240.34/81,271.14
  6. Step 6: Final answer
    x = 54,455.16

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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.