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Finding the Fourth Proportional to 134,889.68, 186,157.80 and 78,309.68

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Solution

The fourth proportional to 134,889.68, 186,157.80 and 78,309.68 is: 108,073.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,889.68 : 186,157.80 = 78,309.68 : x
  2. Step 2: Convert to fraction form
    134,889.68/186,157.80 = 78,309.68/x
  3. Step 3: Cross multiply
    134,889.68x = 186,157.80 × 78,309.68
  4. Step 4: Simplify right side
    134,889.68x = 14,577,957,747.50
  5. Step 5: Solve for x
    x = 14,577,957,747.50/134,889.68
  6. Step 6: Final answer
    x = 108,073.19

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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.