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Finding the Fourth Proportional to 104,987.59, 144,878.69 and 61,980.93

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Solution

The fourth proportional to 104,987.59, 144,878.69 and 61,980.93 is: 85,531.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,987.59 : 144,878.69 = 61,980.93 : x
  2. Step 2: Convert to fraction form
    104,987.59/144,878.69 = 61,980.93/x
  3. Step 3: Cross multiply
    104,987.59x = 144,878.69 × 61,980.93
  4. Step 4: Simplify right side
    104,987.59x = 8,979,715,736.14
  5. Step 5: Solve for x
    x = 8,979,715,736.14/104,987.59
  6. Step 6: Final answer
    x = 85,531.22

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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.