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Finding the Fourth Proportional to 98,838.97, 136,407.56 and 56,403.88

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Solution

The fourth proportional to 98,838.97, 136,407.56 and 56,403.88 is: 77,842.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,838.97 : 136,407.56 = 56,403.88 : x
  2. Step 2: Convert to fraction form
    98,838.97/136,407.56 = 56,403.88/x
  3. Step 3: Cross multiply
    98,838.97x = 136,407.56 × 56,403.88
  4. Step 4: Simplify right side
    98,838.97x = 7,693,915,022.29
  5. Step 5: Solve for x
    x = 7,693,915,022.29/98,838.97
  6. Step 6: Final answer
    x = 77,842.93

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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.