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Finding the Fourth Proportional to 57,181.80, 85,869.90 and 42,407.40

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Solution

The fourth proportional to 57,181.80, 85,869.90 and 42,407.40 is: 63,683.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,181.80 : 85,869.90 = 42,407.40 : x
  2. Step 2: Convert to fraction form
    57,181.80/85,869.90 = 42,407.40/x
  3. Step 3: Cross multiply
    57,181.80x = 85,869.90 × 42,407.40
  4. Step 4: Simplify right side
    57,181.80x = 3,641,519,197.26
  5. Step 5: Solve for x
    x = 3,641,519,197.26/57,181.80
  6. Step 6: Final answer
    x = 63,683.19

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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.