Home / 72,012.09-108,018.15-19,421.58

Finding the Fourth Proportional to 72,012.09, 108,018.15 and 19,421.58

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Solution

The fourth proportional to 72,012.09, 108,018.15 and 19,421.58 is: 29,132.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,012.09 : 108,018.15 = 19,421.58 : x
  2. Step 2: Convert to fraction form
    72,012.09/108,018.15 = 19,421.58/x
  3. Step 3: Cross multiply
    72,012.09x = 108,018.15 × 19,421.58
  4. Step 4: Simplify right side
    72,012.09x = 2,097,883,141.68
  5. Step 5: Solve for x
    x = 2,097,883,141.68/72,012.09
  6. Step 6: Final answer
    x = 29,132.37

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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.