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Finding the Fourth Proportional to 64,758.66, 97,137.63 and 20,388.66

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Solution

The fourth proportional to 64,758.66, 97,137.63 and 20,388.66 is: 30,582.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,758.66 : 97,137.63 = 20,388.66 : x
  2. Step 2: Convert to fraction form
    64,758.66/97,137.63 = 20,388.66/x
  3. Step 3: Cross multiply
    64,758.66x = 97,137.63 × 20,388.66
  4. Step 4: Simplify right side
    64,758.66x = 1,980,506,111.28
  5. Step 5: Solve for x
    x = 1,980,506,111.28/64,758.66
  6. Step 6: Final answer
    x = 30,582.88

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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.