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Finding the Fourth Proportional to 125.90, 188.77 and 56.51

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Solution

The fourth proportional to 125.90, 188.77 and 56.51 is: 84.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.90 : 188.77 = 56.51 : x
  2. Step 2: Convert to fraction form
    125.90/188.77 = 56.51/x
  3. Step 3: Cross multiply
    125.90x = 188.77 × 56.51
  4. Step 4: Simplify right side
    125.90x = 10,666.45
  5. Step 5: Solve for x
    x = 10,666.45/125.90
  6. Step 6: Final answer
    x = 84.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.