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Finding the Fourth Proportional to 61,645.84, 85,075.75 and 34,790.69

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Solution

The fourth proportional to 61,645.84, 85,075.75 and 34,790.69 is: 48,013.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,645.84 : 85,075.75 = 34,790.69 : x
  2. Step 2: Convert to fraction form
    61,645.84/85,075.75 = 34,790.69/x
  3. Step 3: Cross multiply
    61,645.84x = 85,075.75 × 34,790.69
  4. Step 4: Simplify right side
    61,645.84x = 2,959,844,300.95
  5. Step 5: Solve for x
    x = 2,959,844,300.95/61,645.84
  6. Step 6: Final answer
    x = 48,013.69

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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.