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Finding the Fourth Proportional to 68,547.20, 102,840.48 and 28,558.40

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Solution

The fourth proportional to 68,547.20, 102,840.48 and 28,558.40 is: 42,845.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,547.20 : 102,840.48 = 28,558.40 : x
  2. Step 2: Convert to fraction form
    68,547.20/102,840.48 = 28,558.40/x
  3. Step 3: Cross multiply
    68,547.20x = 102,840.48 × 28,558.40
  4. Step 4: Simplify right side
    68,547.20x = 2,936,959,564.03
  5. Step 5: Solve for x
    x = 2,936,959,564.03/68,547.20
  6. Step 6: Final answer
    x = 42,845.80

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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.