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Finding the Fourth Proportional to 125,075.34, 172,605.88 and 68,491.98

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Solution

The fourth proportional to 125,075.34, 172,605.88 and 68,491.98 is: 94,519.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,075.34 : 172,605.88 = 68,491.98 : x
  2. Step 2: Convert to fraction form
    125,075.34/172,605.88 = 68,491.98/x
  3. Step 3: Cross multiply
    125,075.34x = 172,605.88 × 68,491.98
  4. Step 4: Simplify right side
    125,075.34x = 11,822,118,480.84
  5. Step 5: Solve for x
    x = 11,822,118,480.84/125,075.34
  6. Step 6: Final answer
    x = 94,519.98

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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.