Home / 78,051.02-117,063.43-28,121.81

Finding the Fourth Proportional to 78,051.02, 117,063.43 and 28,121.81

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Solution

The fourth proportional to 78,051.02, 117,063.43 and 28,121.81 is: 42,177.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.02 : 117,063.43 = 28,121.81 : x
  2. Step 2: Convert to fraction form
    78,051.02/117,063.43 = 28,121.81/x
  3. Step 3: Cross multiply
    78,051.02x = 117,063.43 × 28,121.81
  4. Step 4: Simplify right side
    78,051.02x = 3,292,034,880.79
  5. Step 5: Solve for x
    x = 3,292,034,880.79/78,051.02
  6. Step 6: Final answer
    x = 42,177.99

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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.