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Finding the Fourth Proportional to 64,984.43, 89,684.54 and 39,484.92

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Solution

The fourth proportional to 64,984.43, 89,684.54 and 39,484.92 is: 54,492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,984.43 : 89,684.54 = 39,484.92 : x
  2. Step 2: Convert to fraction form
    64,984.43/89,684.54 = 39,484.92/x
  3. Step 3: Cross multiply
    64,984.43x = 89,684.54 × 39,484.92
  4. Step 4: Simplify right side
    64,984.43x = 3,541,186,780.67
  5. Step 5: Solve for x
    x = 3,541,186,780.67/64,984.43
  6. Step 6: Final answer
    x = 54,492.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.