Home / 78,051.26-107,720.28-47,840.90

Finding the Fourth Proportional to 78,051.26, 107,720.28 and 47,840.90

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Solution

The fourth proportional to 78,051.26, 107,720.28 and 47,840.90 is: 66,026.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,051.26 : 107,720.28 = 47,840.90 : x
  2. Step 2: Convert to fraction form
    78,051.26/107,720.28 = 47,840.90/x
  3. Step 3: Cross multiply
    78,051.26x = 107,720.28 × 47,840.90
  4. Step 4: Simplify right side
    78,051.26x = 5,153,434,604.85
  5. Step 5: Solve for x
    x = 5,153,434,604.85/78,051.26
  6. Step 6: Final answer
    x = 66,026.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.