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Finding the Fourth Proportional to 125,390, 188,085 and 42,284

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Solution

The fourth proportional to 125,390, 188,085 and 42,284 is: 63,426

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,390 : 188,085 = 42,284 : x
  2. Step 2: Convert to fraction form
    125,390/188,085 = 42,284/x
  3. Step 3: Cross multiply
    125,390x = 188,085 × 42,284
  4. Step 4: Simplify right side
    125,390x = 7,952,986,140
  5. Step 5: Solve for x
    x = 7,952,986,140/125,390
  6. Step 6: Final answer
    x = 63,426

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