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Finding the Fourth Proportional to 112,775.76, 155,630.54 and 61,790.42

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Solution

The fourth proportional to 112,775.76, 155,630.54 and 61,790.42 is: 85,270.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,775.76 : 155,630.54 = 61,790.42 : x
  2. Step 2: Convert to fraction form
    112,775.76/155,630.54 = 61,790.42/x
  3. Step 3: Cross multiply
    112,775.76x = 155,630.54 × 61,790.42
  4. Step 4: Simplify right side
    112,775.76x = 9,616,476,431.43
  5. Step 5: Solve for x
    x = 9,616,476,431.43/112,775.76
  6. Step 6: Final answer
    x = 85,270.77

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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.