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Finding the Fourth Proportional to 64,978.02, 97,466.40 and 20,603.61

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Solution

The fourth proportional to 64,978.02, 97,466.40 and 20,603.61 is: 30,905.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,978.02 : 97,466.40 = 20,603.61 : x
  2. Step 2: Convert to fraction form
    64,978.02/97,466.40 = 20,603.61/x
  3. Step 3: Cross multiply
    64,978.02x = 97,466.40 × 20,603.61
  4. Step 4: Simplify right side
    64,978.02x = 2,008,159,693.70
  5. Step 5: Solve for x
    x = 2,008,159,693.70/64,978.02
  6. Step 6: Final answer
    x = 30,905.22

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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.