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Finding the Fourth Proportional to 64,945.80, 97,418.70 and 57,688.20

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Solution

The fourth proportional to 64,945.80, 97,418.70 and 57,688.20 is: 86,532.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,945.80 : 97,418.70 = 57,688.20 : x
  2. Step 2: Convert to fraction form
    64,945.80/97,418.70 = 57,688.20/x
  3. Step 3: Cross multiply
    64,945.80x = 97,418.70 × 57,688.20
  4. Step 4: Simplify right side
    64,945.80x = 5,619,909,449.34
  5. Step 5: Solve for x
    x = 5,619,909,449.34/64,945.80
  6. Step 6: Final answer
    x = 86,532.30

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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.