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Finding the Fourth Proportional to 79,892.60, 120,011.70 and 56,564.60

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Solution

The fourth proportional to 79,892.60, 120,011.70 and 56,564.60 is: 84,969.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,892.60 : 120,011.70 = 56,564.60 : x
  2. Step 2: Convert to fraction form
    79,892.60/120,011.70 = 56,564.60/x
  3. Step 3: Cross multiply
    79,892.60x = 120,011.70 × 56,564.60
  4. Step 4: Simplify right side
    79,892.60x = 6,788,413,805.82
  5. Step 5: Solve for x
    x = 6,788,413,805.82/79,892.60
  6. Step 6: Final answer
    x = 84,969.24

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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.