Home / 78,168.19-116,686.27-68,709.82

Finding the Fourth Proportional to 78,168.19, 116,686.27 and 68,709.82

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Solution

The fourth proportional to 78,168.19, 116,686.27 and 68,709.82 is: 102,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168.19 : 116,686.27 = 68,709.82 : x
  2. Step 2: Convert to fraction form
    78,168.19/116,686.27 = 68,709.82/x
  3. Step 3: Cross multiply
    78,168.19x = 116,686.27 × 68,709.82
  4. Step 4: Simplify right side
    78,168.19x = 8,017,492,024.74
  5. Step 5: Solve for x
    x = 8,017,492,024.74/78,168.19
  6. Step 6: Final answer
    x = 102,567.20

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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.