Home / 118,721.90-163,749.33-72,782.62

Finding the Fourth Proportional to 118,721.90, 163,749.33 and 72,782.62

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Solution

The fourth proportional to 118,721.90, 163,749.33 and 72,782.62 is: 100,386.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,721.90 : 163,749.33 = 72,782.62 : x
  2. Step 2: Convert to fraction form
    118,721.90/163,749.33 = 72,782.62/x
  3. Step 3: Cross multiply
    118,721.90x = 163,749.33 × 72,782.62
  4. Step 4: Simplify right side
    118,721.90x = 11,918,104,851.27
  5. Step 5: Solve for x
    x = 11,918,104,851.27/118,721.90
  6. Step 6: Final answer
    x = 100,386.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.