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Finding the Fourth Proportional to 64,931.44, 97,411.74 and 20,554.78

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Solution

The fourth proportional to 64,931.44, 97,411.74 and 20,554.78 is: 30,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,931.44 : 97,411.74 = 20,554.78 : x
  2. Step 2: Convert to fraction form
    64,931.44/97,411.74 = 20,554.78/x
  3. Step 3: Cross multiply
    64,931.44x = 97,411.74 × 20,554.78
  4. Step 4: Simplify right side
    64,931.44x = 2,002,276,885.12
  5. Step 5: Solve for x
    x = 2,002,276,885.12/64,931.44
  6. Step 6: Final answer
    x = 30,836.79

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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.