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Finding the Fourth Proportional to 145,381.40, 217,812.90 and 124,645.40

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Solution

The fourth proportional to 145,381.40, 217,812.90 and 124,645.40 is: 186,745.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,381.40 : 217,812.90 = 124,645.40 : x
  2. Step 2: Convert to fraction form
    145,381.40/217,812.90 = 124,645.40/x
  3. Step 3: Cross multiply
    145,381.40x = 217,812.90 × 124,645.40
  4. Step 4: Simplify right side
    145,381.40x = 27,149,376,045.66
  5. Step 5: Solve for x
    x = 27,149,376,045.66/145,381.40
  6. Step 6: Final answer
    x = 186,745.87

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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.