Home / 78,113.29-117,120.26-66,271.14

Finding the Fourth Proportional to 78,113.29, 117,120.26 and 66,271.14

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Solution

The fourth proportional to 78,113.29, 117,120.26 and 66,271.14 is: 99,364.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,113.29 : 117,120.26 = 66,271.14 : x
  2. Step 2: Convert to fraction form
    78,113.29/117,120.26 = 66,271.14/x
  3. Step 3: Cross multiply
    78,113.29x = 117,120.26 × 66,271.14
  4. Step 4: Simplify right side
    78,113.29x = 7,761,693,147.30
  5. Step 5: Solve for x
    x = 7,761,693,147.30/78,113.29
  6. Step 6: Final answer
    x = 99,364.57

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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.