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Finding the Fourth Proportional to 74,865.60, 112,201.28 and 30,440.64

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Solution

The fourth proportional to 74,865.60, 112,201.28 and 30,440.64 is: 45,621.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,865.60 : 112,201.28 = 30,440.64 : x
  2. Step 2: Convert to fraction form
    74,865.60/112,201.28 = 30,440.64/x
  3. Step 3: Cross multiply
    74,865.60x = 112,201.28 × 30,440.64
  4. Step 4: Simplify right side
    74,865.60x = 3,415,478,772.02
  5. Step 5: Solve for x
    x = 3,415,478,772.02/74,865.60
  6. Step 6: Final answer
    x = 45,621.47

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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.