Home / 125,137.21-172,692.15-71,421.16

Finding the Fourth Proportional to 125,137.21, 172,692.15 and 71,421.16

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Solution

The fourth proportional to 125,137.21, 172,692.15 and 71,421.16 is: 98,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,137.21 : 172,692.15 = 71,421.16 : x
  2. Step 2: Convert to fraction form
    125,137.21/172,692.15 = 71,421.16/x
  3. Step 3: Cross multiply
    125,137.21x = 172,692.15 × 71,421.16
  4. Step 4: Simplify right side
    125,137.21x = 12,333,873,675.89
  5. Step 5: Solve for x
    x = 12,333,873,675.89/125,137.21
  6. Step 6: Final answer
    x = 98,562.80

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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.