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Finding the Fourth Proportional to 64,813.72, 97,222.65 and 20,440.87

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Solution

The fourth proportional to 64,813.72, 97,222.65 and 20,440.87 is: 30,661.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,813.72 : 97,222.65 = 20,440.87 : x
  2. Step 2: Convert to fraction form
    64,813.72/97,222.65 = 20,440.87/x
  3. Step 3: Cross multiply
    64,813.72x = 97,222.65 × 20,440.87
  4. Step 4: Simplify right side
    64,813.72x = 1,987,315,549.71
  5. Step 5: Solve for x
    x = 1,987,315,549.71/64,813.72
  6. Step 6: Final answer
    x = 30,661.96

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1.5x scale

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.