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Finding the Fourth Proportional to 92,457.72, 138,700.76 and 39,150

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Solution

The fourth proportional to 92,457.72, 138,700.76 and 39,150 is: 58,731.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,457.72 : 138,700.76 = 39,150 : x
  2. Step 2: Convert to fraction form
    92,457.72/138,700.76 = 39,150/x
  3. Step 3: Cross multiply
    92,457.72x = 138,700.76 × 39,150
  4. Step 4: Simplify right side
    92,457.72x = 5,430,134,558.25
  5. Step 5: Solve for x
    x = 5,430,134,558.25/92,457.72
  6. Step 6: Final answer
    x = 58,731.00

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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.