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Finding the Fourth Proportional to 112,012.80, 154,473.80 and 81,750.18

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Solution

The fourth proportional to 112,012.80, 154,473.80 and 81,750.18 is: 112,739.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,012.80 : 154,473.80 = 81,750.18 : x
  2. Step 2: Convert to fraction form
    112,012.80/154,473.80 = 81,750.18/x
  3. Step 3: Cross multiply
    112,012.80x = 154,473.80 × 81,750.18
  4. Step 4: Simplify right side
    112,012.80x = 12,628,260,955.28
  5. Step 5: Solve for x
    x = 12,628,260,955.28/112,012.80
  6. Step 6: Final answer
    x = 112,739.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.