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Finding the Fourth Proportional to 98,607.28, 136,078 and 53,895.28

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Solution

The fourth proportional to 98,607.28, 136,078 and 53,895.28 is: 74,375.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,607.28 : 136,078 = 53,895.28 : x
  2. Step 2: Convert to fraction form
    98,607.28/136,078 = 53,895.28/x
  3. Step 3: Cross multiply
    98,607.28x = 136,078 × 53,895.28
  4. Step 4: Simplify right side
    98,607.28x = 7,333,961,911.84
  5. Step 5: Solve for x
    x = 7,333,961,911.84/98,607.28
  6. Step 6: Final answer
    x = 74,375.46

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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.