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Finding the Fourth Proportional to 64,721.70, 89,315.76 and 36,427.39

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Solution

The fourth proportional to 64,721.70, 89,315.76 and 36,427.39 is: 50,269.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,721.70 : 89,315.76 = 36,427.39 : x
  2. Step 2: Convert to fraction form
    64,721.70/89,315.76 = 36,427.39/x
  3. Step 3: Cross multiply
    64,721.70x = 89,315.76 × 36,427.39
  4. Step 4: Simplify right side
    64,721.70x = 3,253,539,935.98
  5. Step 5: Solve for x
    x = 3,253,539,935.98/64,721.70
  6. Step 6: Final answer
    x = 50,269.69

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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.