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Finding the Fourth Proportional to 52,639.74, 78,870.51 and 31,819.50

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Solution

The fourth proportional to 52,639.74, 78,870.51 and 31,819.50 is: 47,675.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,639.74 : 78,870.51 = 31,819.50 : x
  2. Step 2: Convert to fraction form
    52,639.74/78,870.51 = 31,819.50/x
  3. Step 3: Cross multiply
    52,639.74x = 78,870.51 × 31,819.50
  4. Step 4: Simplify right side
    52,639.74x = 2,509,620,192.95
  5. Step 5: Solve for x
    x = 2,509,620,192.95/52,639.74
  6. Step 6: Final answer
    x = 47,675.39

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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.