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Finding the Fourth Proportional to 112,996.80, 169,495.20 and 68,710.40

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Solution

The fourth proportional to 112,996.80, 169,495.20 and 68,710.40 is: 103,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,996.80 : 169,495.20 = 68,710.40 : x
  2. Step 2: Convert to fraction form
    112,996.80/169,495.20 = 68,710.40/x
  3. Step 3: Cross multiply
    112,996.80x = 169,495.20 × 68,710.40
  4. Step 4: Simplify right side
    112,996.80x = 11,646,082,990.08
  5. Step 5: Solve for x
    x = 11,646,082,990.08/112,996.80
  6. Step 6: Final answer
    x = 103,065.60

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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.