Home / 72,721.32-108,970.20-43,080.18

Finding the Fourth Proportional to 72,721.32, 108,970.20 and 43,080.18

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Solution

The fourth proportional to 72,721.32, 108,970.20 and 43,080.18 is: 64,554.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.32 : 108,970.20 = 43,080.18 : x
  2. Step 2: Convert to fraction form
    72,721.32/108,970.20 = 43,080.18/x
  3. Step 3: Cross multiply
    72,721.32x = 108,970.20 × 43,080.18
  4. Step 4: Simplify right side
    72,721.32x = 4,694,455,830.64
  5. Step 5: Solve for x
    x = 4,694,455,830.64/72,721.32
  6. Step 6: Final answer
    x = 64,554.05

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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.