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Finding the Fourth Proportional to 64,947.20, 97,420.80 and 47,235.20

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Solution

The fourth proportional to 64,947.20, 97,420.80 and 47,235.20 is: 70,852.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,947.20 : 97,420.80 = 47,235.20 : x
  2. Step 2: Convert to fraction form
    64,947.20/97,420.80 = 47,235.20/x
  3. Step 3: Cross multiply
    64,947.20x = 97,420.80 × 47,235.20
  4. Step 4: Simplify right side
    64,947.20x = 4,601,690,972.16
  5. Step 5: Solve for x
    x = 4,601,690,972.16/64,947.20
  6. Step 6: Final answer
    x = 70,852.80

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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.