Home / 121,187.09-181,509.93-87,830.58

Finding the Fourth Proportional to 121,187.09, 181,509.93 and 87,830.58

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Solution

The fourth proportional to 121,187.09, 181,509.93 and 87,830.58 is: 131,549.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,187.09 : 181,509.93 = 87,830.58 : x
  2. Step 2: Convert to fraction form
    121,187.09/181,509.93 = 87,830.58/x
  3. Step 3: Cross multiply
    121,187.09x = 181,509.93 × 87,830.58
  4. Step 4: Simplify right side
    121,187.09x = 15,942,122,427.66
  5. Step 5: Solve for x
    x = 15,942,122,427.66/121,187.09
  6. Step 6: Final answer
    x = 131,549.68

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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.