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Finding the Fourth Proportional to 99,745.20, 137,618.39 and 65,741.47

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Solution

The fourth proportional to 99,745.20, 137,618.39 and 65,741.47 is: 90,703.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,745.20 : 137,618.39 = 65,741.47 : x
  2. Step 2: Convert to fraction form
    99,745.20/137,618.39 = 65,741.47/x
  3. Step 3: Cross multiply
    99,745.20x = 137,618.39 × 65,741.47
  4. Step 4: Simplify right side
    99,745.20x = 9,047,235,077.94
  5. Step 5: Solve for x
    x = 9,047,235,077.94/99,745.20
  6. Step 6: Final answer
    x = 90,703.46

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1.5x scale

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.