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Finding the Fourth Proportional to 86,999.10, 130,498.65 and 61,629.90

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Solution

The fourth proportional to 86,999.10, 130,498.65 and 61,629.90 is: 92,444.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.10 : 130,498.65 = 61,629.90 : x
  2. Step 2: Convert to fraction form
    86,999.10/130,498.65 = 61,629.90/x
  3. Step 3: Cross multiply
    86,999.10x = 130,498.65 × 61,629.90
  4. Step 4: Simplify right side
    86,999.10x = 8,042,618,749.64
  5. Step 5: Solve for x
    x = 8,042,618,749.64/86,999.10
  6. Step 6: Final answer
    x = 92,444.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.