Home / 121,223.86-181,329.36-85,197.80

Finding the Fourth Proportional to 121,223.86, 181,329.36 and 85,197.80

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Solution

The fourth proportional to 121,223.86, 181,329.36 and 85,197.80 is: 127,440.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,223.86 : 181,329.36 = 85,197.80 : x
  2. Step 2: Convert to fraction form
    121,223.86/181,329.36 = 85,197.80/x
  3. Step 3: Cross multiply
    121,223.86x = 181,329.36 × 85,197.80
  4. Step 4: Simplify right side
    121,223.86x = 15,448,862,547.41
  5. Step 5: Solve for x
    x = 15,448,862,547.41/121,223.86
  6. Step 6: Final answer
    x = 127,440.77

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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.