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Finding the Fourth Proportional to 61,291.96, 84,592.76 and 57,289.76

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Solution

The fourth proportional to 61,291.96, 84,592.76 and 57,289.76 is: 79,069.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,291.96 : 84,592.76 = 57,289.76 : x
  2. Step 2: Convert to fraction form
    61,291.96/84,592.76 = 57,289.76/x
  3. Step 3: Cross multiply
    61,291.96x = 84,592.76 × 57,289.76
  4. Step 4: Simplify right side
    61,291.96x = 4,846,298,918.14
  5. Step 5: Solve for x
    x = 4,846,298,918.14/61,291.96
  6. Step 6: Final answer
    x = 79,069.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.