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Finding the Fourth Proportional to 134,555.50, 185,686.59 and 74,939.50

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Solution

The fourth proportional to 134,555.50, 185,686.59 and 74,939.50 is: 103,416.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,555.50 : 185,686.59 = 74,939.50 : x
  2. Step 2: Convert to fraction form
    134,555.50/185,686.59 = 74,939.50/x
  3. Step 3: Cross multiply
    134,555.50x = 185,686.59 × 74,939.50
  4. Step 4: Simplify right side
    134,555.50x = 13,915,260,211.31
  5. Step 5: Solve for x
    x = 13,915,260,211.31/134,555.50
  6. Step 6: Final answer
    x = 103,416.51

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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.