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Finding the Fourth Proportional to 125,075.36, 172,630.80 and 79,742.90

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Solution

The fourth proportional to 125,075.36, 172,630.80 and 79,742.90 is: 110,062.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,075.36 : 172,630.80 = 79,742.90 : x
  2. Step 2: Convert to fraction form
    125,075.36/172,630.80 = 79,742.90/x
  3. Step 3: Cross multiply
    125,075.36x = 172,630.80 × 79,742.90
  4. Step 4: Simplify right side
    125,075.36x = 13,766,080,621.32
  5. Step 5: Solve for x
    x = 13,766,080,621.32/125,075.36
  6. Step 6: Final answer
    x = 110,062.29

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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.