Home / 78,154.27-117,259.65-30,743.18

Finding the Fourth Proportional to 78,154.27, 117,259.65 and 30,743.18

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Solution

The fourth proportional to 78,154.27, 117,259.65 and 30,743.18 is: 46,125.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,154.27 : 117,259.65 = 30,743.18 : x
  2. Step 2: Convert to fraction form
    78,154.27/117,259.65 = 30,743.18/x
  3. Step 3: Cross multiply
    78,154.27x = 117,259.65 × 30,743.18
  4. Step 4: Simplify right side
    78,154.27x = 3,604,934,874.80
  5. Step 5: Solve for x
    x = 3,604,934,874.80/78,154.27
  6. Step 6: Final answer
    x = 46,125.89

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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.