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Finding the Fourth Proportional to 77,033.80, 115,589.10 and 43,779.40

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Solution

The fourth proportional to 77,033.80, 115,589.10 and 43,779.40 is: 65,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,033.80 : 115,589.10 = 43,779.40 : x
  2. Step 2: Convert to fraction form
    77,033.80/115,589.10 = 43,779.40/x
  3. Step 3: Cross multiply
    77,033.80x = 115,589.10 × 43,779.40
  4. Step 4: Simplify right side
    77,033.80x = 5,060,421,444.54
  5. Step 5: Solve for x
    x = 5,060,421,444.54/77,033.80
  6. Step 6: Final answer
    x = 65,690.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.