Home / 129,477.67-178,696.22-72,900.07

Finding the Fourth Proportional to 129,477.67, 178,696.22 and 72,900.07

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Solution

The fourth proportional to 129,477.67, 178,696.22 and 72,900.07 is: 100,611.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,477.67 : 178,696.22 = 72,900.07 : x
  2. Step 2: Convert to fraction form
    129,477.67/178,696.22 = 72,900.07/x
  3. Step 3: Cross multiply
    129,477.67x = 178,696.22 × 72,900.07
  4. Step 4: Simplify right side
    129,477.67x = 13,026,966,946.74
  5. Step 5: Solve for x
    x = 13,026,966,946.74/129,477.67
  6. Step 6: Final answer
    x = 100,611.69

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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.