Home / 129,814.02-179,141.34-72,450.36

Finding the Fourth Proportional to 129,814.02, 179,141.34 and 72,450.36

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Solution

The fourth proportional to 129,814.02, 179,141.34 and 72,450.36 is: 99,980.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,814.02 : 179,141.34 = 72,450.36 : x
  2. Step 2: Convert to fraction form
    129,814.02/179,141.34 = 72,450.36/x
  3. Step 3: Cross multiply
    129,814.02x = 179,141.34 × 72,450.36
  4. Step 4: Simplify right side
    129,814.02x = 12,978,854,573.88
  5. Step 5: Solve for x
    x = 12,978,854,573.88/129,814.02
  6. Step 6: Final answer
    x = 99,980.38

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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.