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Finding the Fourth Proportional to 72,952.80, 109,364.40 and 43,339.20

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Solution

The fourth proportional to 72,952.80, 109,364.40 and 43,339.20 is: 64,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,952.80 : 109,364.40 = 43,339.20 : x
  2. Step 2: Convert to fraction form
    72,952.80/109,364.40 = 43,339.20/x
  3. Step 3: Cross multiply
    72,952.80x = 109,364.40 × 43,339.20
  4. Step 4: Simplify right side
    72,952.80x = 4,739,765,604.48
  5. Step 5: Solve for x
    x = 4,739,765,604.48/72,952.80
  6. Step 6: Final answer
    x = 64,970.30

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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.