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Finding the Fourth Proportional to 84,030.60, 125,892.30 and 68,363.40

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Solution

The fourth proportional to 84,030.60, 125,892.30 and 68,363.40 is: 102,420.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,030.60 : 125,892.30 = 68,363.40 : x
  2. Step 2: Convert to fraction form
    84,030.60/125,892.30 = 68,363.40/x
  3. Step 3: Cross multiply
    84,030.60x = 125,892.30 × 68,363.40
  4. Step 4: Simplify right side
    84,030.60x = 8,606,425,661.82
  5. Step 5: Solve for x
    x = 8,606,425,661.82/84,030.60
  6. Step 6: Final answer
    x = 102,420.14

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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.