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Finding the Fourth Proportional to 59,681.12, 89,523.68 and 18,128

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Solution

The fourth proportional to 59,681.12, 89,523.68 and 18,128 is: 27,192.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,681.12 : 89,523.68 = 18,128 : x
  2. Step 2: Convert to fraction form
    59,681.12/89,523.68 = 18,128/x
  3. Step 3: Cross multiply
    59,681.12x = 89,523.68 × 18,128
  4. Step 4: Simplify right side
    59,681.12x = 1,622,885,271.04
  5. Step 5: Solve for x
    x = 1,622,885,271.04/59,681.12
  6. Step 6: Final answer
    x = 27,192.61

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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.