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Finding the Fourth Proportional to 76,164.21, 105,106.68 and 42,630.21

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Solution

The fourth proportional to 76,164.21, 105,106.68 and 42,630.21 is: 58,829.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,164.21 : 105,106.68 = 42,630.21 : x
  2. Step 2: Convert to fraction form
    76,164.21/105,106.68 = 42,630.21/x
  3. Step 3: Cross multiply
    76,164.21x = 105,106.68 × 42,630.21
  4. Step 4: Simplify right side
    76,164.21x = 4,480,719,840.80
  5. Step 5: Solve for x
    x = 4,480,719,840.80/76,164.21
  6. Step 6: Final answer
    x = 58,829.73

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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.