Home / 78,170.18-116,689.26-68,711.82

Finding the Fourth Proportional to 78,170.18, 116,689.26 and 68,711.82

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Solution

The fourth proportional to 78,170.18, 116,689.26 and 68,711.82 is: 102,570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,170.18 : 116,689.26 = 68,711.82 : x
  2. Step 2: Convert to fraction form
    78,170.18/116,689.26 = 68,711.82/x
  3. Step 3: Cross multiply
    78,170.18x = 116,689.26 × 68,711.82
  4. Step 4: Simplify right side
    78,170.18x = 8,017,931,429.05
  5. Step 5: Solve for x
    x = 8,017,931,429.05/78,170.18
  6. Step 6: Final answer
    x = 102,570.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.