Home / 78,769.35-118,161.39-31,373.01

Finding the Fourth Proportional to 78,769.35, 118,161.39 and 31,373.01

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Solution

The fourth proportional to 78,769.35, 118,161.39 and 31,373.01 is: 47,062.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,769.35 : 118,161.39 = 31,373.01 : x
  2. Step 2: Convert to fraction form
    78,769.35/118,161.39 = 31,373.01/x
  3. Step 3: Cross multiply
    78,769.35x = 118,161.39 × 31,373.01
  4. Step 4: Simplify right side
    78,769.35x = 3,707,078,470.08
  5. Step 5: Solve for x
    x = 3,707,078,470.08/78,769.35
  6. Step 6: Final answer
    x = 47,062.45

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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.