Home / 121,091.81-181,638.72-42,205.91

Finding the Fourth Proportional to 121,091.81, 181,638.72 and 42,205.91

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Solution

The fourth proportional to 121,091.81, 181,638.72 and 42,205.91 is: 63,309.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,091.81 : 181,638.72 = 42,205.91 : x
  2. Step 2: Convert to fraction form
    121,091.81/181,638.72 = 42,205.91/x
  3. Step 3: Cross multiply
    121,091.81x = 181,638.72 × 42,205.91
  4. Step 4: Simplify right side
    121,091.81x = 7,666,226,560.64
  5. Step 5: Solve for x
    x = 7,666,226,560.64/121,091.81
  6. Step 6: Final answer
    x = 63,309.21

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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.