Home / 81,047.09-121,588.61-31,127.20

Finding the Fourth Proportional to 81,047.09, 121,588.61 and 31,127.20

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Solution

The fourth proportional to 81,047.09, 121,588.61 and 31,127.20 is: 46,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,047.09 : 121,588.61 = 31,127.20 : x
  2. Step 2: Convert to fraction form
    81,047.09/121,588.61 = 31,127.20/x
  3. Step 3: Cross multiply
    81,047.09x = 121,588.61 × 31,127.20
  4. Step 4: Simplify right side
    81,047.09x = 3,784,712,521.58
  5. Step 5: Solve for x
    x = 3,784,712,521.58/81,047.09
  6. Step 6: Final answer
    x = 46,697.70

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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.