Home / 78,439.74-117,628.47-28,492.59

Finding the Fourth Proportional to 78,439.74, 117,628.47 and 28,492.59

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Solution

The fourth proportional to 78,439.74, 117,628.47 and 28,492.59 is: 42,727.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.74 : 117,628.47 = 28,492.59 : x
  2. Step 2: Convert to fraction form
    78,439.74/117,628.47 = 28,492.59/x
  3. Step 3: Cross multiply
    78,439.74x = 117,628.47 × 28,492.59
  4. Step 4: Simplify right side
    78,439.74x = 3,351,539,768.04
  5. Step 5: Solve for x
    x = 3,351,539,768.04/78,439.74
  6. Step 6: Final answer
    x = 42,727.57

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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.