Home / 129,602.36-178,852.05-72,245.32

Finding the Fourth Proportional to 129,602.36, 178,852.05 and 72,245.32

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Solution

The fourth proportional to 129,602.36, 178,852.05 and 72,245.32 is: 99,698.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,602.36 : 178,852.05 = 72,245.32 : x
  2. Step 2: Convert to fraction form
    129,602.36/178,852.05 = 72,245.32/x
  3. Step 3: Cross multiply
    129,602.36x = 178,852.05 × 72,245.32
  4. Step 4: Simplify right side
    129,602.36x = 12,921,223,137.78
  5. Step 5: Solve for x
    x = 12,921,223,137.78/129,602.36
  6. Step 6: Final answer
    x = 99,698.98

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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.