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Finding the Fourth Proportional to 69,980.74, 104,970.72 and 17,390.20

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Solution

The fourth proportional to 69,980.74, 104,970.72 and 17,390.20 is: 26,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,980.74 : 104,970.72 = 17,390.20 : x
  2. Step 2: Convert to fraction form
    69,980.74/104,970.72 = 17,390.20/x
  3. Step 3: Cross multiply
    69,980.74x = 104,970.72 × 17,390.20
  4. Step 4: Simplify right side
    69,980.74x = 1,825,461,814.94
  5. Step 5: Solve for x
    x = 1,825,461,814.94/69,980.74
  6. Step 6: Final answer
    x = 26,085.20

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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.