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Finding the Fourth Proportional to 144,065.80, 215,969.10 and 91,448.20

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Solution

The fourth proportional to 144,065.80, 215,969.10 and 91,448.20 is: 137,090.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,065.80 : 215,969.10 = 91,448.20 : x
  2. Step 2: Convert to fraction form
    144,065.80/215,969.10 = 91,448.20/x
  3. Step 3: Cross multiply
    144,065.80x = 215,969.10 × 91,448.20
  4. Step 4: Simplify right side
    144,065.80x = 19,749,985,450.62
  5. Step 5: Solve for x
    x = 19,749,985,450.62/144,065.80
  6. Step 6: Final answer
    x = 137,090.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.