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Finding the Fourth Proportional to 111,577.82, 153,980.07 and 61,277.90

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Solution

The fourth proportional to 111,577.82, 153,980.07 and 61,277.90 is: 84,564.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,577.82 : 153,980.07 = 61,277.90 : x
  2. Step 2: Convert to fraction form
    111,577.82/153,980.07 = 61,277.90/x
  3. Step 3: Cross multiply
    111,577.82x = 153,980.07 × 61,277.90
  4. Step 4: Simplify right side
    111,577.82x = 9,435,575,331.45
  5. Step 5: Solve for x
    x = 9,435,575,331.45/111,577.82
  6. Step 6: Final answer
    x = 84,564.97

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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.