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Finding the Fourth Proportional to 57,277.60, 85,916.40 and 39,781.60

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Solution

The fourth proportional to 57,277.60, 85,916.40 and 39,781.60 is: 59,672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,277.60 : 85,916.40 = 39,781.60 : x
  2. Step 2: Convert to fraction form
    57,277.60/85,916.40 = 39,781.60/x
  3. Step 3: Cross multiply
    57,277.60x = 85,916.40 × 39,781.60
  4. Step 4: Simplify right side
    57,277.60x = 3,417,891,858.24
  5. Step 5: Solve for x
    x = 3,417,891,858.24/57,277.60
  6. Step 6: Final answer
    x = 59,672.40

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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.