Home / 78,909.48-118,364.67-26,318.81

Finding the Fourth Proportional to 78,909.48, 118,364.67 and 26,318.81

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Solution

The fourth proportional to 78,909.48, 118,364.67 and 26,318.81 is: 39,478.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.48 : 118,364.67 = 26,318.81 : x
  2. Step 2: Convert to fraction form
    78,909.48/118,364.67 = 26,318.81/x
  3. Step 3: Cross multiply
    78,909.48x = 118,364.67 × 26,318.81
  4. Step 4: Simplify right side
    78,909.48x = 3,115,217,260.44
  5. Step 5: Solve for x
    x = 3,115,217,260.44/78,909.48
  6. Step 6: Final answer
    x = 39,478.37

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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.