Home / 66,138.82-91,221.55-45,985.62

Finding the Fourth Proportional to 66,138.82, 91,221.55 and 45,985.62

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Solution

The fourth proportional to 66,138.82, 91,221.55 and 45,985.62 is: 63,425.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.82 : 91,221.55 = 45,985.62 : x
  2. Step 2: Convert to fraction form
    66,138.82/91,221.55 = 45,985.62/x
  3. Step 3: Cross multiply
    66,138.82x = 91,221.55 × 45,985.62
  4. Step 4: Simplify right side
    66,138.82x = 4,194,879,534.11
  5. Step 5: Solve for x
    x = 4,194,879,534.11/66,138.82
  6. Step 6: Final answer
    x = 63,425.38

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Find fourth proportional to 66,139.82, 91,222.93 and 45,986.62
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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.