Home / 120,880.81-181,315.68-42,001.21

Finding the Fourth Proportional to 120,880.81, 181,315.68 and 42,001.21

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Solution

The fourth proportional to 120,880.81, 181,315.68 and 42,001.21 is: 62,999.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,880.81 : 181,315.68 = 42,001.21 : x
  2. Step 2: Convert to fraction form
    120,880.81/181,315.68 = 42,001.21/x
  3. Step 3: Cross multiply
    120,880.81x = 181,315.68 × 42,001.21
  4. Step 4: Simplify right side
    120,880.81x = 7,615,477,951.97
  5. Step 5: Solve for x
    x = 7,615,477,951.97/120,880.81
  6. Step 6: Final answer
    x = 62,999.89

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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.