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Finding the Fourth Proportional to 64,981.96, 97,472.76 and 53,172.16

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Solution

The fourth proportional to 64,981.96, 97,472.76 and 53,172.16 is: 79,758.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,981.96 : 97,472.76 = 53,172.16 : x
  2. Step 2: Convert to fraction form
    64,981.96/97,472.76 = 53,172.16/x
  3. Step 3: Cross multiply
    64,981.96x = 97,472.76 × 53,172.16
  4. Step 4: Simplify right side
    64,981.96x = 5,182,837,190.36
  5. Step 5: Solve for x
    x = 5,182,837,190.36/64,981.96
  6. Step 6: Final answer
    x = 79,758.09

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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.