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Finding the Fourth Proportional to 57,215.79, 85,827.47 and 19,779.48

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Solution

The fourth proportional to 57,215.79, 85,827.47 and 19,779.48 is: 29,670.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,215.79 : 85,827.47 = 19,779.48 : x
  2. Step 2: Convert to fraction form
    57,215.79/85,827.47 = 19,779.48/x
  3. Step 3: Cross multiply
    57,215.79x = 85,827.47 × 19,779.48
  4. Step 4: Simplify right side
    57,215.79x = 1,697,622,627.42
  5. Step 5: Solve for x
    x = 1,697,622,627.42/57,215.79
  6. Step 6: Final answer
    x = 29,670.53

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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.