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Finding the Fourth Proportional to 68,970.47, 95,095.76 and 53,661.47

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Solution

The fourth proportional to 68,970.47, 95,095.76 and 53,661.47 is: 73,987.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,970.47 : 95,095.76 = 53,661.47 : x
  2. Step 2: Convert to fraction form
    68,970.47/95,095.76 = 53,661.47/x
  3. Step 3: Cross multiply
    68,970.47x = 95,095.76 × 53,661.47
  4. Step 4: Simplify right side
    68,970.47x = 5,102,978,004.06
  5. Step 5: Solve for x
    x = 5,102,978,004.06/68,970.47
  6. Step 6: Final answer
    x = 73,987.87

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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.