Home / 129,586.54-178,830.26-72,229.51

Finding the Fourth Proportional to 129,586.54, 178,830.26 and 72,229.51

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Solution

The fourth proportional to 129,586.54, 178,830.26 and 72,229.51 is: 99,677.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.54 : 178,830.26 = 72,229.51 : x
  2. Step 2: Convert to fraction form
    129,586.54/178,830.26 = 72,229.51/x
  3. Step 3: Cross multiply
    129,586.54x = 178,830.26 × 72,229.51
  4. Step 4: Simplify right side
    129,586.54x = 12,916,821,068.53
  5. Step 5: Solve for x
    x = 12,916,821,068.53/129,586.54
  6. Step 6: Final answer
    x = 99,677.18

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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.