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Finding the Fourth Proportional to 57,307.95, 85,945.32 and 19,866.51

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Solution

The fourth proportional to 57,307.95, 85,945.32 and 19,866.51 is: 29,794.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,307.95 : 85,945.32 = 19,866.51 : x
  2. Step 2: Convert to fraction form
    57,307.95/85,945.32 = 19,866.51/x
  3. Step 3: Cross multiply
    57,307.95x = 85,945.32 × 19,866.51
  4. Step 4: Simplify right side
    57,307.95x = 1,707,433,559.23
  5. Step 5: Solve for x
    x = 1,707,433,559.23/57,307.95
  6. Step 6: Final answer
    x = 29,794.01

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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.