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Finding the Fourth Proportional to 42,328.60, 63,639.30 and 39,587.80

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Solution

The fourth proportional to 42,328.60, 63,639.30 and 39,587.80 is: 59,518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,328.60 : 63,639.30 = 39,587.80 : x
  2. Step 2: Convert to fraction form
    42,328.60/63,639.30 = 39,587.80/x
  3. Step 3: Cross multiply
    42,328.60x = 63,639.30 × 39,587.80
  4. Step 4: Simplify right side
    42,328.60x = 2,519,339,880.54
  5. Step 5: Solve for x
    x = 2,519,339,880.54/42,328.60
  6. Step 6: Final answer
    x = 59,518.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.