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Finding the Fourth Proportional to 82,808.60, 124,212.90 and 38,420.60

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Solution

The fourth proportional to 82,808.60, 124,212.90 and 38,420.60 is: 57,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,808.60 : 124,212.90 = 38,420.60 : x
  2. Step 2: Convert to fraction form
    82,808.60/124,212.90 = 38,420.60/x
  3. Step 3: Cross multiply
    82,808.60x = 124,212.90 × 38,420.60
  4. Step 4: Simplify right side
    82,808.60x = 4,772,334,145.74
  5. Step 5: Solve for x
    x = 4,772,334,145.74/82,808.60
  6. Step 6: Final answer
    x = 57,630.90

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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.