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Finding the Fourth Proportional to 98,878.74, 136,461.09 and 55,866.12

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Solution

The fourth proportional to 98,878.74, 136,461.09 and 55,866.12 is: 77,100.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,878.74 : 136,461.09 = 55,866.12 : x
  2. Step 2: Convert to fraction form
    98,878.74/136,461.09 = 55,866.12/x
  3. Step 3: Cross multiply
    98,878.74x = 136,461.09 × 55,866.12
  4. Step 4: Simplify right side
    98,878.74x = 7,623,551,629.27
  5. Step 5: Solve for x
    x = 7,623,551,629.27/98,878.74
  6. Step 6: Final answer
    x = 77,100.01

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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.