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Finding the Fourth Proportional to 121,136.50, 181,712.04 and 38,030.50

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Solution

The fourth proportional to 121,136.50, 181,712.04 and 38,030.50 is: 57,048.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,136.50 : 181,712.04 = 38,030.50 : x
  2. Step 2: Convert to fraction form
    121,136.50/181,712.04 = 38,030.50/x
  3. Step 3: Cross multiply
    121,136.50x = 181,712.04 × 38,030.50
  4. Step 4: Simplify right side
    121,136.50x = 6,910,599,737.22
  5. Step 5: Solve for x
    x = 6,910,599,737.22/121,136.50
  6. Step 6: Final answer
    x = 57,048.04

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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.