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Finding the Fourth Proportional to 78,567.84, 117,696.24 and 68,718.24

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Solution

The fourth proportional to 78,567.84, 117,696.24 and 68,718.24 is: 102,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,567.84 : 117,696.24 = 68,718.24 : x
  2. Step 2: Convert to fraction form
    78,567.84/117,696.24 = 68,718.24/x
  3. Step 3: Cross multiply
    78,567.84x = 117,696.24 × 68,718.24
  4. Step 4: Simplify right side
    78,567.84x = 8,087,878,467.42
  5. Step 5: Solve for x
    x = 8,087,878,467.42/78,567.84
  6. Step 6: Final answer
    x = 102,941.34

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1.5x scale

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.