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Finding the Fourth Proportional to 86,038.83, 118,720.76 and 48,305.79

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Solution

The fourth proportional to 86,038.83, 118,720.76 and 48,305.79 is: 66,654.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,038.83 : 118,720.76 = 48,305.79 : x
  2. Step 2: Convert to fraction form
    86,038.83/118,720.76 = 48,305.79/x
  3. Step 3: Cross multiply
    86,038.83x = 118,720.76 × 48,305.79
  4. Step 4: Simplify right side
    86,038.83x = 5,734,899,859.67
  5. Step 5: Solve for x
    x = 5,734,899,859.67/86,038.83
  6. Step 6: Final answer
    x = 66,654.79

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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.