Home / 78,045.73-117,037.71-28,108.42

Finding the Fourth Proportional to 78,045.73, 117,037.71 and 28,108.42

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Solution

The fourth proportional to 78,045.73, 117,037.71 and 28,108.42 is: 42,151.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,045.73 : 117,037.71 = 28,108.42 : x
  2. Step 2: Convert to fraction form
    78,045.73/117,037.71 = 28,108.42/x
  3. Step 3: Cross multiply
    78,045.73x = 117,037.71 × 28,108.42
  4. Step 4: Simplify right side
    78,045.73x = 3,289,744,815.92
  5. Step 5: Solve for x
    x = 3,289,744,815.92/78,045.73
  6. Step 6: Final answer
    x = 42,151.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.