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Finding the Fourth Proportional to 101,011.61, 139,389.46 and 55,689.97

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Solution

The fourth proportional to 101,011.61, 139,389.46 and 55,689.97 is: 76,848.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,011.61 : 139,389.46 = 55,689.97 : x
  2. Step 2: Convert to fraction form
    101,011.61/139,389.46 = 55,689.97/x
  3. Step 3: Cross multiply
    101,011.61x = 139,389.46 × 55,689.97
  4. Step 4: Simplify right side
    101,011.61x = 7,762,594,358.02
  5. Step 5: Solve for x
    x = 7,762,594,358.02/101,011.61
  6. Step 6: Final answer
    x = 76,848.54

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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.