Home / 81,488.40-122,159.70-53,421.90

Finding the Fourth Proportional to 81,488.40, 122,159.70 and 53,421.90

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Solution

The fourth proportional to 81,488.40, 122,159.70 and 53,421.90 is: 80,085.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,488.40 : 122,159.70 = 53,421.90 : x
  2. Step 2: Convert to fraction form
    81,488.40/122,159.70 = 53,421.90/x
  3. Step 3: Cross multiply
    81,488.40x = 122,159.70 × 53,421.90
  4. Step 4: Simplify right side
    81,488.40x = 6,526,003,277.43
  5. Step 5: Solve for x
    x = 6,526,003,277.43/81,488.40
  6. Step 6: Final answer
    x = 80,085.06

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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.