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Finding the Fourth Proportional to 90,671.58, 136,051.92 and 40,786.92

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Solution

The fourth proportional to 90,671.58, 136,051.92 and 40,786.92 is: 61,200.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,671.58 : 136,051.92 = 40,786.92 : x
  2. Step 2: Convert to fraction form
    90,671.58/136,051.92 = 40,786.92/x
  3. Step 3: Cross multiply
    90,671.58x = 136,051.92 × 40,786.92
  4. Step 4: Simplify right side
    90,671.58x = 5,549,138,776.89
  5. Step 5: Solve for x
    x = 5,549,138,776.89/90,671.58
  6. Step 6: Final answer
    x = 61,200.42

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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.