Home / 100,347.10-138,485.40-66,295.85

Finding the Fourth Proportional to 100,347.10, 138,485.40 and 66,295.85

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Solution

The fourth proportional to 100,347.10, 138,485.40 and 66,295.85 is: 91,492.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,347.10 : 138,485.40 = 66,295.85 : x
  2. Step 2: Convert to fraction form
    100,347.10/138,485.40 = 66,295.85/x
  3. Step 3: Cross multiply
    100,347.10x = 138,485.40 × 66,295.85
  4. Step 4: Simplify right side
    100,347.10x = 9,181,007,651.80
  5. Step 5: Solve for x
    x = 9,181,007,651.80/100,347.10
  6. Step 6: Final answer
    x = 91,492.51

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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.