Home / 99,811.64-137,731.79-56,779.68

Finding the Fourth Proportional to 99,811.64, 137,731.79 and 56,779.68

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Solution

The fourth proportional to 99,811.64, 137,731.79 and 56,779.68 is: 78,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,811.64 : 137,731.79 = 56,779.68 : x
  2. Step 2: Convert to fraction form
    99,811.64/137,731.79 = 56,779.68/x
  3. Step 3: Cross multiply
    99,811.64x = 137,731.79 × 56,779.68
  4. Step 4: Simplify right side
    99,811.64x = 7,820,367,620.47
  5. Step 5: Solve for x
    x = 7,820,367,620.47/99,811.64
  6. Step 6: Final answer
    x = 78,351.26

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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.