Home / 129,507.37-178,696.47-72,145.29

Finding the Fourth Proportional to 129,507.37, 178,696.47 and 72,145.29

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Solution

The fourth proportional to 129,507.37, 178,696.47 and 72,145.29 is: 99,547.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,507.37 : 178,696.47 = 72,145.29 : x
  2. Step 2: Convert to fraction form
    129,507.37/178,696.47 = 72,145.29/x
  3. Step 3: Cross multiply
    129,507.37x = 178,696.47 × 72,145.29
  4. Step 4: Simplify right side
    129,507.37x = 12,892,108,650.13
  5. Step 5: Solve for x
    x = 12,892,108,650.13/129,507.37
  6. Step 6: Final answer
    x = 99,547.30

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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.