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Finding the Fourth Proportional to 98,168.13, 147,243.94 and 38,987.91

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Solution

The fourth proportional to 98,168.13, 147,243.94 and 38,987.91 is: 58,478.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,168.13 : 147,243.94 = 38,987.91 : x
  2. Step 2: Convert to fraction form
    98,168.13/147,243.94 = 38,987.91/x
  3. Step 3: Cross multiply
    98,168.13x = 147,243.94 × 38,987.91
  4. Step 4: Simplify right side
    98,168.13x = 5,740,733,480.77
  5. Step 5: Solve for x
    x = 5,740,733,480.77/98,168.13
  6. Step 6: Final answer
    x = 58,478.59

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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.