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Finding the Fourth Proportional to 64,968.72, 97,453.08 and 15,720.72

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Solution

The fourth proportional to 64,968.72, 97,453.08 and 15,720.72 is: 23,581.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,968.72 : 97,453.08 = 15,720.72 : x
  2. Step 2: Convert to fraction form
    64,968.72/97,453.08 = 15,720.72/x
  3. Step 3: Cross multiply
    64,968.72x = 97,453.08 × 15,720.72
  4. Step 4: Simplify right side
    64,968.72x = 1,532,032,583.82
  5. Step 5: Solve for x
    x = 1,532,032,583.82/64,968.72
  6. Step 6: Final answer
    x = 23,581.08

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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.