Home / 78,079.12-117,094.51-28,152.79

Finding the Fourth Proportional to 78,079.12, 117,094.51 and 28,152.79

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Solution

The fourth proportional to 78,079.12, 117,094.51 and 28,152.79 is: 42,220.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.12 : 117,094.51 = 28,152.79 : x
  2. Step 2: Convert to fraction form
    78,079.12/117,094.51 = 28,152.79/x
  3. Step 3: Cross multiply
    78,079.12x = 117,094.51 × 28,152.79
  4. Step 4: Simplify right side
    78,079.12x = 3,296,537,150.18
  5. Step 5: Solve for x
    x = 3,296,537,150.18/78,079.12
  6. Step 6: Final answer
    x = 42,220.47

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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.