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Finding the Fourth Proportional to 103,648.61, 155,457.43 and 28,760.87

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Solution

The fourth proportional to 103,648.61, 155,457.43 and 28,760.87 is: 43,137.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,648.61 : 155,457.43 = 28,760.87 : x
  2. Step 2: Convert to fraction form
    103,648.61/155,457.43 = 28,760.87/x
  3. Step 3: Cross multiply
    103,648.61x = 155,457.43 × 28,760.87
  4. Step 4: Simplify right side
    103,648.61x = 4,471,091,251.51
  5. Step 5: Solve for x
    x = 4,471,091,251.51/103,648.61
  6. Step 6: Final answer
    x = 43,137.01

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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.