Home / 129,239.04-178,330.56-72,639.48

Finding the Fourth Proportional to 129,239.04, 178,330.56 and 72,639.48

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Solution

The fourth proportional to 129,239.04, 178,330.56 and 72,639.48 is: 100,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,239.04 : 178,330.56 = 72,639.48 : x
  2. Step 2: Convert to fraction form
    129,239.04/178,330.56 = 72,639.48/x
  3. Step 3: Cross multiply
    129,239.04x = 178,330.56 × 72,639.48
  4. Step 4: Simplify right side
    129,239.04x = 12,953,839,146.51
  5. Step 5: Solve for x
    x = 12,953,839,146.51/129,239.04
  6. Step 6: Final answer
    x = 100,231.63

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1.5x scale

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.