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Finding the Fourth Proportional to 76,609.50, 105,721.14 and 43,075.50

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Solution

The fourth proportional to 76,609.50, 105,721.14 and 43,075.50 is: 59,444.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,609.50 : 105,721.14 = 43,075.50 : x
  2. Step 2: Convert to fraction form
    76,609.50/105,721.14 = 43,075.50/x
  3. Step 3: Cross multiply
    76,609.50x = 105,721.14 × 43,075.50
  4. Step 4: Simplify right side
    76,609.50x = 4,553,990,966.07
  5. Step 5: Solve for x
    x = 4,553,990,966.07/76,609.50
  6. Step 6: Final answer
    x = 59,444.21

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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.