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Finding the Fourth Proportional to 120,860.79, 181,456.23 and 83,328.23

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Solution

The fourth proportional to 120,860.79, 181,456.23 and 83,328.23 is: 125,106.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,860.79 : 181,456.23 = 83,328.23 : x
  2. Step 2: Convert to fraction form
    120,860.79/181,456.23 = 83,328.23/x
  3. Step 3: Cross multiply
    120,860.79x = 181,456.23 × 83,328.23
  4. Step 4: Simplify right side
    120,860.79x = 15,120,425,561.09
  5. Step 5: Solve for x
    x = 15,120,425,561.09/120,860.79
  6. Step 6: Final answer
    x = 125,106.13

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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.