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Finding the Fourth Proportional to 64,854.69, 89,505.35 and 39,367.55

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Solution

The fourth proportional to 64,854.69, 89,505.35 and 39,367.55 is: 54,330.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,854.69 : 89,505.35 = 39,367.55 : x
  2. Step 2: Convert to fraction form
    64,854.69/89,505.35 = 39,367.55/x
  3. Step 3: Cross multiply
    64,854.69x = 89,505.35 × 39,367.55
  4. Step 4: Simplify right side
    64,854.69x = 3,523,605,697.03
  5. Step 5: Solve for x
    x = 3,523,605,697.03/64,854.69
  6. Step 6: Final answer
    x = 54,330.78

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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.