Home / 78,763.86-118,071.27-31,408.20

Finding the Fourth Proportional to 78,763.86, 118,071.27 and 31,408.20

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Solution

The fourth proportional to 78,763.86, 118,071.27 and 31,408.20 is: 47,082.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.86 : 118,071.27 = 31,408.20 : x
  2. Step 2: Convert to fraction form
    78,763.86/118,071.27 = 31,408.20/x
  3. Step 3: Cross multiply
    78,763.86x = 118,071.27 × 31,408.20
  4. Step 4: Simplify right side
    78,763.86x = 3,708,406,062.41
  5. Step 5: Solve for x
    x = 3,708,406,062.41/78,763.86
  6. Step 6: Final answer
    x = 47,082.58

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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.