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Finding the Fourth Proportional to 98,793.47, 136,283.82 and 62,921.21

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Solution

The fourth proportional to 98,793.47, 136,283.82 and 62,921.21 is: 86,798.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,793.47 : 136,283.82 = 62,921.21 : x
  2. Step 2: Convert to fraction form
    98,793.47/136,283.82 = 62,921.21/x
  3. Step 3: Cross multiply
    98,793.47x = 136,283.82 × 62,921.21
  4. Step 4: Simplify right side
    98,793.47x = 8,575,141,940.45
  5. Step 5: Solve for x
    x = 8,575,141,940.45/98,793.47
  6. Step 6: Final answer
    x = 86,798.67

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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.