Home / 129,103.04-178,143.36-72,511.04

Finding the Fourth Proportional to 129,103.04, 178,143.36 and 72,511.04

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Solution

The fourth proportional to 129,103.04, 178,143.36 and 72,511.04 is: 100,054.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,103.04 : 178,143.36 = 72,511.04 : x
  2. Step 2: Convert to fraction form
    129,103.04/178,143.36 = 72,511.04/x
  3. Step 3: Cross multiply
    129,103.04x = 178,143.36 × 72,511.04
  4. Step 4: Simplify right side
    129,103.04x = 12,917,360,302.69
  5. Step 5: Solve for x
    x = 12,917,360,302.69/129,103.04
  6. Step 6: Final answer
    x = 100,054.66

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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.