Home / 78,347.91-117,578.93-28,432.03

Finding the Fourth Proportional to 78,347.91, 117,578.93 and 28,432.03

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Solution

The fourth proportional to 78,347.91, 117,578.93 and 28,432.03 is: 42,668.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.91 : 117,578.93 = 28,432.03 : x
  2. Step 2: Convert to fraction form
    78,347.91/117,578.93 = 28,432.03/x
  3. Step 3: Cross multiply
    78,347.91x = 117,578.93 × 28,432.03
  4. Step 4: Simplify right side
    78,347.91x = 3,343,007,073.39
  5. Step 5: Solve for x
    x = 3,343,007,073.39/78,347.91
  6. Step 6: Final answer
    x = 42,668.75

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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.