Home / 86,485.28-129,731.78-26,509.44

Finding the Fourth Proportional to 86,485.28, 129,731.78 and 26,509.44

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Solution

The fourth proportional to 86,485.28, 129,731.78 and 26,509.44 is: 39,765.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,485.28 : 129,731.78 = 26,509.44 : x
  2. Step 2: Convert to fraction form
    86,485.28/129,731.78 = 26,509.44/x
  3. Step 3: Cross multiply
    86,485.28x = 129,731.78 × 26,509.44
  4. Step 4: Simplify right side
    86,485.28x = 3,439,116,838.00
  5. Step 5: Solve for x
    x = 3,439,116,838.00/86,485.28
  6. Step 6: Final answer
    x = 39,765.34

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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.