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Finding the Fourth Proportional to 125,495.16, 188,270.82 and 42,387

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Solution

The fourth proportional to 125,495.16, 188,270.82 and 42,387 is: 63,589.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,495.16 : 188,270.82 = 42,387 : x
  2. Step 2: Convert to fraction form
    125,495.16/188,270.82 = 42,387/x
  3. Step 3: Cross multiply
    125,495.16x = 188,270.82 × 42,387
  4. Step 4: Simplify right side
    125,495.16x = 7,980,235,247.34
  5. Step 5: Solve for x
    x = 7,980,235,247.34/125,495.16
  6. Step 6: Final answer
    x = 63,589.98

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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.