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Finding the Fourth Proportional to 101,310.29, 139,810.98 and 55,991.21

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Solution

The fourth proportional to 101,310.29, 139,810.98 and 55,991.21 is: 77,269.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,310.29 : 139,810.98 = 55,991.21 : x
  2. Step 2: Convert to fraction form
    101,310.29/139,810.98 = 55,991.21/x
  3. Step 3: Cross multiply
    101,310.29x = 139,810.98 × 55,991.21
  4. Step 4: Simplify right side
    101,310.29x = 7,828,185,242.43
  5. Step 5: Solve for x
    x = 7,828,185,242.43/101,310.29
  6. Step 6: Final answer
    x = 77,269.40

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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.