Home / 81,402.30-122,103.45-57,782.70

Finding the Fourth Proportional to 81,402.30, 122,103.45 and 57,782.70

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Solution

The fourth proportional to 81,402.30, 122,103.45 and 57,782.70 is: 86,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,402.30 : 122,103.45 = 57,782.70 : x
  2. Step 2: Convert to fraction form
    81,402.30/122,103.45 = 57,782.70/x
  3. Step 3: Cross multiply
    81,402.30x = 122,103.45 × 57,782.70
  4. Step 4: Simplify right side
    81,402.30x = 7,055,467,020.32
  5. Step 5: Solve for x
    x = 7,055,467,020.32/81,402.30
  6. Step 6: Final answer
    x = 86,674.05

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1.5x scale

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.