Home / 72,120.32-99,525.84-40,289.28

Finding the Fourth Proportional to 72,120.32, 99,525.84 and 40,289.28

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Solution

The fourth proportional to 72,120.32, 99,525.84 and 40,289.28 is: 55,599.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,120.32 : 99,525.84 = 40,289.28 : x
  2. Step 2: Convert to fraction form
    72,120.32/99,525.84 = 40,289.28/x
  3. Step 3: Cross multiply
    72,120.32x = 99,525.84 × 40,289.28
  4. Step 4: Simplify right side
    72,120.32x = 4,009,824,435.00
  5. Step 5: Solve for x
    x = 4,009,824,435.00/72,120.32
  6. Step 6: Final answer
    x = 55,599.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.