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Finding the Fourth Proportional to 74,419.20, 111,628.80 and 36,986.40

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Solution

The fourth proportional to 74,419.20, 111,628.80 and 36,986.40 is: 55,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,419.20 : 111,628.80 = 36,986.40 : x
  2. Step 2: Convert to fraction form
    74,419.20/111,628.80 = 36,986.40/x
  3. Step 3: Cross multiply
    74,419.20x = 111,628.80 × 36,986.40
  4. Step 4: Simplify right side
    74,419.20x = 4,128,747,448.32
  5. Step 5: Solve for x
    x = 4,128,747,448.32/74,419.20
  6. Step 6: Final answer
    x = 55,479.60

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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.