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Finding the Fourth Proportional to 85,642.62, 128,276.36 and 43,450.22

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Solution

The fourth proportional to 85,642.62, 128,276.36 and 43,450.22 is: 65,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,642.62 : 128,276.36 = 43,450.22 : x
  2. Step 2: Convert to fraction form
    85,642.62/128,276.36 = 43,450.22/x
  3. Step 3: Cross multiply
    85,642.62x = 128,276.36 × 43,450.22
  4. Step 4: Simplify right side
    85,642.62x = 5,573,636,329.18
  5. Step 5: Solve for x
    x = 5,573,636,329.18/85,642.62
  6. Step 6: Final answer
    x = 65,080.17

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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.