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Finding the Fourth Proportional to 64,800.78, 89,423.67 and 36,120.39

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Solution

The fourth proportional to 64,800.78, 89,423.67 and 36,120.39 is: 49,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,800.78 : 89,423.67 = 36,120.39 : x
  2. Step 2: Convert to fraction form
    64,800.78/89,423.67 = 36,120.39/x
  3. Step 3: Cross multiply
    64,800.78x = 89,423.67 × 36,120.39
  4. Step 4: Simplify right side
    64,800.78x = 3,230,017,835.63
  5. Step 5: Solve for x
    x = 3,230,017,835.63/64,800.78
  6. Step 6: Final answer
    x = 49,845.35

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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.