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Finding the Fourth Proportional to 64,812.50, 97,218.75 and 21,036.50

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Solution

The fourth proportional to 64,812.50, 97,218.75 and 21,036.50 is: 31,554.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,812.50 : 97,218.75 = 21,036.50 : x
  2. Step 2: Convert to fraction form
    64,812.50/97,218.75 = 21,036.50/x
  3. Step 3: Cross multiply
    64,812.50x = 97,218.75 × 21,036.50
  4. Step 4: Simplify right side
    64,812.50x = 2,045,142,234.38
  5. Step 5: Solve for x
    x = 2,045,142,234.38/64,812.50
  6. Step 6: Final answer
    x = 31,554.75

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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.