Home / 78,126.42-116,989.45-54,077.39

Finding the Fourth Proportional to 78,126.42, 116,989.45 and 54,077.39

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Solution

The fourth proportional to 78,126.42, 116,989.45 and 54,077.39 is: 80,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.42 : 116,989.45 = 54,077.39 : x
  2. Step 2: Convert to fraction form
    78,126.42/116,989.45 = 54,077.39/x
  3. Step 3: Cross multiply
    78,126.42x = 116,989.45 × 54,077.39
  4. Step 4: Simplify right side
    78,126.42x = 6,326,483,832.11
  5. Step 5: Solve for x
    x = 6,326,483,832.11/78,126.42
  6. Step 6: Final answer
    x = 80,977.52

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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.