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Finding the Fourth Proportional to 98,914.78, 136,508.34 and 60,678.64

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Solution

The fourth proportional to 98,914.78, 136,508.34 and 60,678.64 is: 83,740.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,914.78 : 136,508.34 = 60,678.64 : x
  2. Step 2: Convert to fraction form
    98,914.78/136,508.34 = 60,678.64/x
  3. Step 3: Cross multiply
    98,914.78x = 136,508.34 × 60,678.64
  4. Step 4: Simplify right side
    98,914.78x = 8,283,140,419.86
  5. Step 5: Solve for x
    x = 8,283,140,419.86/98,914.78
  6. Step 6: Final answer
    x = 83,740.17

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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.