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Finding the Fourth Proportional to 86,743.64, 130,015.06 and 39,898.20

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Solution

The fourth proportional to 86,743.64, 130,015.06 and 39,898.20 is: 59,801.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,743.64 : 130,015.06 = 39,898.20 : x
  2. Step 2: Convert to fraction form
    86,743.64/130,015.06 = 39,898.20/x
  3. Step 3: Cross multiply
    86,743.64x = 130,015.06 × 39,898.20
  4. Step 4: Simplify right side
    86,743.64x = 5,187,366,866.89
  5. Step 5: Solve for x
    x = 5,187,366,866.89/86,743.64
  6. Step 6: Final answer
    x = 59,801.12

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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.