Home / 121,114.10-181,703.55-86,122.10

Finding the Fourth Proportional to 121,114.10, 181,703.55 and 86,122.10

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Solution

The fourth proportional to 121,114.10, 181,703.55 and 86,122.10 is: 129,206.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,114.10 : 181,703.55 = 86,122.10 : x
  2. Step 2: Convert to fraction form
    121,114.10/181,703.55 = 86,122.10/x
  3. Step 3: Cross multiply
    121,114.10x = 181,703.55 × 86,122.10
  4. Step 4: Simplify right side
    121,114.10x = 15,648,691,303.46
  5. Step 5: Solve for x
    x = 15,648,691,303.46/121,114.10
  6. Step 6: Final answer
    x = 129,206.19

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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.