Home / 99,820.08-137,763.84-57,378.60

Finding the Fourth Proportional to 99,820.08, 137,763.84 and 57,378.60

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Solution

The fourth proportional to 99,820.08, 137,763.84 and 57,378.60 is: 79,189.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,820.08 : 137,763.84 = 57,378.60 : x
  2. Step 2: Convert to fraction form
    99,820.08/137,763.84 = 57,378.60/x
  3. Step 3: Cross multiply
    99,820.08x = 137,763.84 × 57,378.60
  4. Step 4: Simplify right side
    99,820.08x = 7,904,696,269.82
  5. Step 5: Solve for x
    x = 7,904,696,269.82/99,820.08
  6. Step 6: Final answer
    x = 79,189.44

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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.