Home / 129,088.44-178,143.30-74,636.52

Finding the Fourth Proportional to 129,088.44, 178,143.30 and 74,636.52

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Solution

The fourth proportional to 129,088.44, 178,143.30 and 74,636.52 is: 102,999.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,088.44 : 178,143.30 = 74,636.52 : x
  2. Step 2: Convert to fraction form
    129,088.44/178,143.30 = 74,636.52/x
  3. Step 3: Cross multiply
    129,088.44x = 178,143.30 × 74,636.52
  4. Step 4: Simplify right side
    129,088.44x = 13,295,995,973.32
  5. Step 5: Solve for x
    x = 13,295,995,973.32/129,088.44
  6. Step 6: Final answer
    x = 102,999.12

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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.