Home / 81,728.32-122,602.08-29,145.28

Finding the Fourth Proportional to 81,728.32, 122,602.08 and 29,145.28

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Solution

The fourth proportional to 81,728.32, 122,602.08 and 29,145.28 is: 43,721.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,728.32 : 122,602.08 = 29,145.28 : x
  2. Step 2: Convert to fraction form
    81,728.32/122,602.08 = 29,145.28/x
  3. Step 3: Cross multiply
    81,728.32x = 122,602.08 × 29,145.28
  4. Step 4: Simplify right side
    81,728.32x = 3,573,271,950.18
  5. Step 5: Solve for x
    x = 3,573,271,950.18/81,728.32
  6. Step 6: Final answer
    x = 43,721.34

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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.