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Finding the Fourth Proportional to 74,969.70, 112,382.55 and 43,347.30

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Solution

The fourth proportional to 74,969.70, 112,382.55 and 43,347.30 is: 64,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,969.70 : 112,382.55 = 43,347.30 : x
  2. Step 2: Convert to fraction form
    74,969.70/112,382.55 = 43,347.30/x
  3. Step 3: Cross multiply
    74,969.70x = 112,382.55 × 43,347.30
  4. Step 4: Simplify right side
    74,969.70x = 4,871,480,109.62
  5. Step 5: Solve for x
    x = 4,871,480,109.62/74,969.70
  6. Step 6: Final answer
    x = 64,979.32

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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.