Home / 129,342.84-178,483.47-72,743.28

Finding the Fourth Proportional to 129,342.84, 178,483.47 and 72,743.28

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Solution

The fourth proportional to 129,342.84, 178,483.47 and 72,743.28 is: 100,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,342.84 : 178,483.47 = 72,743.28 : x
  2. Step 2: Convert to fraction form
    129,342.84/178,483.47 = 72,743.28/x
  3. Step 3: Cross multiply
    129,342.84x = 178,483.47 × 72,743.28
  4. Step 4: Simplify right side
    129,342.84x = 12,983,473,033.58
  5. Step 5: Solve for x
    x = 12,983,473,033.58/129,342.84
  6. Step 6: Final answer
    x = 100,380.30

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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.