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Finding the Fourth Proportional to 86,065.64, 118,781.70 and 48,339.89

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Solution

The fourth proportional to 86,065.64, 118,781.70 and 48,339.89 is: 66,715.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,065.64 : 118,781.70 = 48,339.89 : x
  2. Step 2: Convert to fraction form
    86,065.64/118,781.70 = 48,339.89/x
  3. Step 3: Cross multiply
    86,065.64x = 118,781.70 × 48,339.89
  4. Step 4: Simplify right side
    86,065.64x = 5,741,894,312.01
  5. Step 5: Solve for x
    x = 5,741,894,312.01/86,065.64
  6. Step 6: Final answer
    x = 66,715.29

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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.