Home / 87,022.80-130,631.40-81,312.30

Finding the Fourth Proportional to 87,022.80, 130,631.40 and 81,312.30

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Solution

The fourth proportional to 87,022.80, 130,631.40 and 81,312.30 is: 122,059.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,022.80 : 130,631.40 = 81,312.30 : x
  2. Step 2: Convert to fraction form
    87,022.80/130,631.40 = 81,312.30/x
  3. Step 3: Cross multiply
    87,022.80x = 130,631.40 × 81,312.30
  4. Step 4: Simplify right side
    87,022.80x = 10,621,939,586.22
  5. Step 5: Solve for x
    x = 10,621,939,586.22/87,022.80
  6. Step 6: Final answer
    x = 122,059.27

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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.