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Finding the Fourth Proportional to 98,672.15, 147,983.60 and 38,712.81

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Solution

The fourth proportional to 98,672.15, 147,983.60 and 38,712.81 is: 58,059.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,672.15 : 147,983.60 = 38,712.81 : x
  2. Step 2: Convert to fraction form
    98,672.15/147,983.60 = 38,712.81/x
  3. Step 3: Cross multiply
    98,672.15x = 147,983.60 × 38,712.81
  4. Step 4: Simplify right side
    98,672.15x = 5,728,860,953.23
  5. Step 5: Solve for x
    x = 5,728,860,953.23/98,672.15
  6. Step 6: Final answer
    x = 58,059.55

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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.