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Finding the Fourth Proportional to 111,577.77, 153,932.81 and 71,281.08

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Solution

The fourth proportional to 111,577.77, 153,932.81 and 71,281.08 is: 98,339.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,577.77 : 153,932.81 = 71,281.08 : x
  2. Step 2: Convert to fraction form
    111,577.77/153,932.81 = 71,281.08/x
  3. Step 3: Cross multiply
    111,577.77x = 153,932.81 × 71,281.08
  4. Step 4: Simplify right side
    111,577.77x = 10,972,496,587.83
  5. Step 5: Solve for x
    x = 10,972,496,587.83/111,577.77
  6. Step 6: Final answer
    x = 98,339.45

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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.