Home / 78,864.81-118,198.76-39,433.20

Finding the Fourth Proportional to 78,864.81, 118,198.76 and 39,433.20

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Solution

The fourth proportional to 78,864.81, 118,198.76 and 39,433.20 is: 59,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,864.81 : 118,198.76 = 39,433.20 : x
  2. Step 2: Convert to fraction form
    78,864.81/118,198.76 = 39,433.20/x
  3. Step 3: Cross multiply
    78,864.81x = 118,198.76 × 39,433.20
  4. Step 4: Simplify right side
    78,864.81x = 4,660,955,342.83
  5. Step 5: Solve for x
    x = 4,660,955,342.83/78,864.81
  6. Step 6: Final answer
    x = 59,100.57

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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.