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Finding the Fourth Proportional to 64,947.60, 97,421.40 and 54,012.60

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Solution

The fourth proportional to 64,947.60, 97,421.40 and 54,012.60 is: 81,018.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,947.60 : 97,421.40 = 54,012.60 : x
  2. Step 2: Convert to fraction form
    64,947.60/97,421.40 = 54,012.60/x
  3. Step 3: Cross multiply
    64,947.60x = 97,421.40 × 54,012.60
  4. Step 4: Simplify right side
    64,947.60x = 5,261,983,109.64
  5. Step 5: Solve for x
    x = 5,261,983,109.64/64,947.60
  6. Step 6: Final answer
    x = 81,018.90

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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.