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Finding the Fourth Proportional to 86,205.86, 118,962.94 and 48,480.11

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Solution

The fourth proportional to 86,205.86, 118,962.94 and 48,480.11 is: 66,901.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,205.86 : 118,962.94 = 48,480.11 : x
  2. Step 2: Convert to fraction form
    86,205.86/118,962.94 = 48,480.11/x
  3. Step 3: Cross multiply
    86,205.86x = 118,962.94 × 48,480.11
  4. Step 4: Simplify right side
    86,205.86x = 5,767,336,417.12
  5. Step 5: Solve for x
    x = 5,767,336,417.12/86,205.86
  6. Step 6: Final answer
    x = 66,901.91

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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.