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Finding the Fourth Proportional to 109,691.64, 151,368.84 and 61,284.96

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Solution

The fourth proportional to 109,691.64, 151,368.84 and 61,284.96 is: 84,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,691.64 : 151,368.84 = 61,284.96 : x
  2. Step 2: Convert to fraction form
    109,691.64/151,368.84 = 61,284.96/x
  3. Step 3: Cross multiply
    109,691.64x = 151,368.84 × 61,284.96
  4. Step 4: Simplify right side
    109,691.64x = 9,276,633,304.65
  5. Step 5: Solve for x
    x = 9,276,633,304.65/109,691.64
  6. Step 6: Final answer
    x = 84,570.10

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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.