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Finding the Fourth Proportional to 64,987.21, 97,484.27 and 20,617.51

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Solution

The fourth proportional to 64,987.21, 97,484.27 and 20,617.51 is: 30,927.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,987.21 : 97,484.27 = 20,617.51 : x
  2. Step 2: Convert to fraction form
    64,987.21/97,484.27 = 20,617.51/x
  3. Step 3: Cross multiply
    64,987.21x = 97,484.27 × 20,617.51
  4. Step 4: Simplify right side
    64,987.21x = 2,009,882,911.57
  5. Step 5: Solve for x
    x = 2,009,882,911.57/64,987.21
  6. Step 6: Final answer
    x = 30,927.36

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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.