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Finding the Fourth Proportional to 72,335.60, 108,429.08 and 30,240.30

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Solution

The fourth proportional to 72,335.60, 108,429.08 and 30,240.30 is: 45,329.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,335.60 : 108,429.08 = 30,240.30 : x
  2. Step 2: Convert to fraction form
    72,335.60/108,429.08 = 30,240.30/x
  3. Step 3: Cross multiply
    72,335.60x = 108,429.08 × 30,240.30
  4. Step 4: Simplify right side
    72,335.60x = 3,278,927,907.92
  5. Step 5: Solve for x
    x = 3,278,927,907.92/72,335.60
  6. Step 6: Final answer
    x = 45,329.38

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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.