Home / 78,142.23-107,749.43-56,589.35

Finding the Fourth Proportional to 78,142.23, 107,749.43 and 56,589.35

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Solution

The fourth proportional to 78,142.23, 107,749.43 and 56,589.35 is: 78,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.23 : 107,749.43 = 56,589.35 : x
  2. Step 2: Convert to fraction form
    78,142.23/107,749.43 = 56,589.35/x
  3. Step 3: Cross multiply
    78,142.23x = 107,749.43 × 56,589.35
  4. Step 4: Simplify right side
    78,142.23x = 6,097,469,384.88
  5. Step 5: Solve for x
    x = 6,097,469,384.88/78,142.23
  6. Step 6: Final answer
    x = 78,030.40

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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.