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Finding the Fourth Proportional to 111,579.59, 153,980.93 and 61,278.59

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Solution

The fourth proportional to 111,579.59, 153,980.93 and 61,278.59 is: 84,565.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,579.59 : 153,980.93 = 61,278.59 : x
  2. Step 2: Convert to fraction form
    111,579.59/153,980.93 = 61,278.59/x
  3. Step 3: Cross multiply
    111,579.59x = 153,980.93 × 61,278.59
  4. Step 4: Simplify right side
    111,579.59x = 9,435,734,277.29
  5. Step 5: Solve for x
    x = 9,435,734,277.29/111,579.59
  6. Step 6: Final answer
    x = 84,565.06

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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.