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Finding the Fourth Proportional to 112,641.36, 155,443.80 and 61,653.96

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Solution

The fourth proportional to 112,641.36, 155,443.80 and 61,653.96 is: 85,081.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,641.36 : 155,443.80 = 61,653.96 : x
  2. Step 2: Convert to fraction form
    112,641.36/155,443.80 = 61,653.96/x
  3. Step 3: Cross multiply
    112,641.36x = 155,443.80 × 61,653.96
  4. Step 4: Simplify right side
    112,641.36x = 9,583,725,827.45
  5. Step 5: Solve for x
    x = 9,583,725,827.45/112,641.36
  6. Step 6: Final answer
    x = 85,081.77

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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.