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Finding the Fourth Proportional to 125,075.62, 172,621.61 and 76,706.47

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Solution

The fourth proportional to 125,075.62, 172,621.61 and 76,706.47 is: 105,865.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,075.62 : 172,621.61 = 76,706.47 : x
  2. Step 2: Convert to fraction form
    125,075.62/172,621.61 = 76,706.47/x
  3. Step 3: Cross multiply
    125,075.62x = 172,621.61 × 76,706.47
  4. Step 4: Simplify right side
    125,075.62x = 13,241,194,348.82
  5. Step 5: Solve for x
    x = 13,241,194,348.82/125,075.62
  6. Step 6: Final answer
    x = 105,865.51

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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.