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Finding the Fourth Proportional to 91,954.40, 138,061.20 and 56,962.40

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Solution

The fourth proportional to 91,954.40, 138,061.20 and 56,962.40 is: 85,523.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,954.40 : 138,061.20 = 56,962.40 : x
  2. Step 2: Convert to fraction form
    91,954.40/138,061.20 = 56,962.40/x
  3. Step 3: Cross multiply
    91,954.40x = 138,061.20 × 56,962.40
  4. Step 4: Simplify right side
    91,954.40x = 7,864,297,298.88
  5. Step 5: Solve for x
    x = 7,864,297,298.88/91,954.40
  6. Step 6: Final answer
    x = 85,523.88

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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.