Home / 81,409.23-121,903.55-56,186.60

Finding the Fourth Proportional to 81,409.23, 121,903.55 and 56,186.60

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Solution

The fourth proportional to 81,409.23, 121,903.55 and 56,186.60 is: 84,134.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,409.23 : 121,903.55 = 56,186.60 : x
  2. Step 2: Convert to fraction form
    81,409.23/121,903.55 = 56,186.60/x
  3. Step 3: Cross multiply
    81,409.23x = 121,903.55 × 56,186.60
  4. Step 4: Simplify right side
    81,409.23x = 6,849,345,111.98
  5. Step 5: Solve for x
    x = 6,849,345,111.98/81,409.23
  6. Step 6: Final answer
    x = 84,134.75

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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.