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Finding the Fourth Proportional to 98,988.48, 136,603.68 and 54,276.48

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Solution

The fourth proportional to 98,988.48, 136,603.68 and 54,276.48 is: 74,901.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,988.48 : 136,603.68 = 54,276.48 : x
  2. Step 2: Convert to fraction form
    98,988.48/136,603.68 = 54,276.48/x
  3. Step 3: Cross multiply
    98,988.48x = 136,603.68 × 54,276.48
  4. Step 4: Simplify right side
    98,988.48x = 7,414,366,905.45
  5. Step 5: Solve for x
    x = 7,414,366,905.45/98,988.48
  6. Step 6: Final answer
    x = 74,901.31

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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.