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Finding the Fourth Proportional to 105,324.71, 145,109.07 and 79,868.03

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Solution

The fourth proportional to 105,324.71, 145,109.07 and 79,868.03 is: 110,036.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,324.71 : 145,109.07 = 79,868.03 : x
  2. Step 2: Convert to fraction form
    105,324.71/145,109.07 = 79,868.03/x
  3. Step 3: Cross multiply
    105,324.71x = 145,109.07 × 79,868.03
  4. Step 4: Simplify right side
    105,324.71x = 11,589,574,830.49
  5. Step 5: Solve for x
    x = 11,589,574,830.49/105,324.71
  6. Step 6: Final answer
    x = 110,036.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.