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Finding the Fourth Proportional to 59,354.98, 81,920.31 and 57,384.40

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Solution

The fourth proportional to 59,354.98, 81,920.31 and 57,384.40 is: 79,200.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,354.98 : 81,920.31 = 57,384.40 : x
  2. Step 2: Convert to fraction form
    59,354.98/81,920.31 = 57,384.40/x
  3. Step 3: Cross multiply
    59,354.98x = 81,920.31 × 57,384.40
  4. Step 4: Simplify right side
    59,354.98x = 4,700,947,893.56
  5. Step 5: Solve for x
    x = 4,700,947,893.56/59,354.98
  6. Step 6: Final answer
    x = 79,200.57

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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.