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Finding the Fourth Proportional to 74,976.80, 112,409.64 and 45,387.63

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Solution

The fourth proportional to 74,976.80, 112,409.64 and 45,387.63 is: 68,047.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,976.80 : 112,409.64 = 45,387.63 : x
  2. Step 2: Convert to fraction form
    74,976.80/112,409.64 = 45,387.63/x
  3. Step 3: Cross multiply
    74,976.80x = 112,409.64 × 45,387.63
  4. Step 4: Simplify right side
    74,976.80x = 5,102,007,148.75
  5. Step 5: Solve for x
    x = 5,102,007,148.75/74,976.80
  6. Step 6: Final answer
    x = 68,047.81

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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.