Home / 78,323.85-117,519.60-28,411.02

Finding the Fourth Proportional to 78,323.85, 117,519.60 and 28,411.02

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Solution

The fourth proportional to 78,323.85, 117,519.60 and 28,411.02 is: 42,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,323.85 : 117,519.60 = 28,411.02 : x
  2. Step 2: Convert to fraction form
    78,323.85/117,519.60 = 28,411.02/x
  3. Step 3: Cross multiply
    78,323.85x = 117,519.60 × 28,411.02
  4. Step 4: Simplify right side
    78,323.85x = 3,338,851,705.99
  5. Step 5: Solve for x
    x = 3,338,851,705.99/78,323.85
  6. Step 6: Final answer
    x = 42,628.80

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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.