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Finding the Fourth Proportional to 98,178.50, 135,486.34 and 53,466.50

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Solution

The fourth proportional to 98,178.50, 135,486.34 and 53,466.50 is: 73,783.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,178.50 : 135,486.34 = 53,466.50 : x
  2. Step 2: Convert to fraction form
    98,178.50/135,486.34 = 53,466.50/x
  3. Step 3: Cross multiply
    98,178.50x = 135,486.34 × 53,466.50
  4. Step 4: Simplify right side
    98,178.50x = 7,243,980,397.61
  5. Step 5: Solve for x
    x = 7,243,980,397.61/98,178.50
  6. Step 6: Final answer
    x = 73,783.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.