Home / 129,092.07-178,117.95-78,103.53

Finding the Fourth Proportional to 129,092.07, 178,117.95 and 78,103.53

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Solution

The fourth proportional to 129,092.07, 178,117.95 and 78,103.53 is: 107,765.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,092.07 : 178,117.95 = 78,103.53 : x
  2. Step 2: Convert to fraction form
    129,092.07/178,117.95 = 78,103.53/x
  3. Step 3: Cross multiply
    129,092.07x = 178,117.95 × 78,103.53
  4. Step 4: Simplify right side
    129,092.07x = 13,911,640,651.36
  5. Step 5: Solve for x
    x = 13,911,640,651.36/129,092.07
  6. Step 6: Final answer
    x = 107,765.26

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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.