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Finding the Fourth Proportional to 98,707.84, 136,216.38 and 53,385.87

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Solution

The fourth proportional to 98,707.84, 136,216.38 and 53,385.87 is: 73,672.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,707.84 : 136,216.38 = 53,385.87 : x
  2. Step 2: Convert to fraction form
    98,707.84/136,216.38 = 53,385.87/x
  3. Step 3: Cross multiply
    98,707.84x = 136,216.38 × 53,385.87
  4. Step 4: Simplify right side
    98,707.84x = 7,272,030,665.56
  5. Step 5: Solve for x
    x = 7,272,030,665.56/98,707.84
  6. Step 6: Final answer
    x = 73,672.27

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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.