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Finding the Fourth Proportional to 124,692.84, 172,075.05 and 68,103

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Solution

The fourth proportional to 124,692.84, 172,075.05 and 68,103 is: 93,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,692.84 : 172,075.05 = 68,103 : x
  2. Step 2: Convert to fraction form
    124,692.84/172,075.05 = 68,103/x
  3. Step 3: Cross multiply
    124,692.84x = 172,075.05 × 68,103
  4. Step 4: Simplify right side
    124,692.84x = 11,718,827,130.15
  5. Step 5: Solve for x
    x = 11,718,827,130.15/124,692.84
  6. Step 6: Final answer
    x = 93,981.56

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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.