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Finding the Fourth Proportional to 84,312.82, 126,482.96 and 39,379.11

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Solution

The fourth proportional to 84,312.82, 126,482.96 and 39,379.11 is: 59,075.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.82 : 126,482.96 = 39,379.11 : x
  2. Step 2: Convert to fraction form
    84,312.82/126,482.96 = 39,379.11/x
  3. Step 3: Cross multiply
    84,312.82x = 126,482.96 × 39,379.11
  4. Step 4: Simplify right side
    84,312.82x = 4,980,786,394.97
  5. Step 5: Solve for x
    x = 4,980,786,394.97/84,312.82
  6. Step 6: Final answer
    x = 59,075.08

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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.