Home / 122,129.76-168,470.28-71,136.48

Finding the Fourth Proportional to 122,129.76, 168,470.28 and 71,136.48

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Solution

The fourth proportional to 122,129.76, 168,470.28 and 71,136.48 is: 98,128.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,129.76 : 168,470.28 = 71,136.48 : x
  2. Step 2: Convert to fraction form
    122,129.76/168,470.28 = 71,136.48/x
  3. Step 3: Cross multiply
    122,129.76x = 168,470.28 × 71,136.48
  4. Step 4: Simplify right side
    122,129.76x = 11,984,382,703.81
  5. Step 5: Solve for x
    x = 11,984,382,703.81/122,129.76
  6. Step 6: Final answer
    x = 98,128.28

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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.