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Finding the Fourth Proportional to 64,749.60, 97,124.40 and 20,389.95

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Solution

The fourth proportional to 64,749.60, 97,124.40 and 20,389.95 is: 30,584.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,749.60 : 97,124.40 = 20,389.95 : x
  2. Step 2: Convert to fraction form
    64,749.60/97,124.40 = 20,389.95/x
  3. Step 3: Cross multiply
    64,749.60x = 97,124.40 × 20,389.95
  4. Step 4: Simplify right side
    64,749.60x = 1,980,361,659.78
  5. Step 5: Solve for x
    x = 1,980,361,659.78/64,749.60
  6. Step 6: Final answer
    x = 30,584.93

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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.