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Finding the Fourth Proportional to 64,783.55, 97,165.73 and 20,421.16

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Solution

The fourth proportional to 64,783.55, 97,165.73 and 20,421.16 is: 30,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,783.55 : 97,165.73 = 20,421.16 : x
  2. Step 2: Convert to fraction form
    64,783.55/97,165.73 = 20,421.16/x
  3. Step 3: Cross multiply
    64,783.55x = 97,165.73 × 20,421.16
  4. Step 4: Simplify right side
    64,783.55x = 1,984,237,158.67
  5. Step 5: Solve for x
    x = 1,984,237,158.67/64,783.55
  6. Step 6: Final answer
    x = 30,628.72

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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.