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Finding the Fourth Proportional to 82,613.80, 123,783.90 and 47,492.20

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Solution

The fourth proportional to 82,613.80, 123,783.90 and 47,492.20 is: 71,159.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,613.80 : 123,783.90 = 47,492.20 : x
  2. Step 2: Convert to fraction form
    82,613.80/123,783.90 = 47,492.20/x
  3. Step 3: Cross multiply
    82,613.80x = 123,783.90 × 47,492.20
  4. Step 4: Simplify right side
    82,613.80x = 5,878,769,735.58
  5. Step 5: Solve for x
    x = 5,878,769,735.58/82,613.80
  6. Step 6: Final answer
    x = 71,159.66

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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.