Home / 78,570.61-117,789.90-63,742.75

Finding the Fourth Proportional to 78,570.61, 117,789.90 and 63,742.75

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Solution

The fourth proportional to 78,570.61, 117,789.90 and 63,742.75 is: 95,560.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,570.61 : 117,789.90 = 63,742.75 : x
  2. Step 2: Convert to fraction form
    78,570.61/117,789.90 = 63,742.75/x
  3. Step 3: Cross multiply
    78,570.61x = 117,789.90 × 63,742.75
  4. Step 4: Simplify right side
    78,570.61x = 7,508,252,148.23
  5. Step 5: Solve for x
    x = 7,508,252,148.23/78,570.61
  6. Step 6: Final answer
    x = 95,560.57

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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.