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Finding the Fourth Proportional to 68,955.80, 103,433.70 and 68,518.40

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Solution

The fourth proportional to 68,955.80, 103,433.70 and 68,518.40 is: 102,777.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,955.80 : 103,433.70 = 68,518.40 : x
  2. Step 2: Convert to fraction form
    68,955.80/103,433.70 = 68,518.40/x
  3. Step 3: Cross multiply
    68,955.80x = 103,433.70 × 68,518.40
  4. Step 4: Simplify right side
    68,955.80x = 7,087,111,630.08
  5. Step 5: Solve for x
    x = 7,087,111,630.08/68,955.80
  6. Step 6: Final answer
    x = 102,777.60

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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.