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Finding the Fourth Proportional to 64,685.80, 89,262.66 and 36,389.80

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Solution

The fourth proportional to 64,685.80, 89,262.66 and 36,389.80 is: 50,215.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,685.80 : 89,262.66 = 36,389.80 : x
  2. Step 2: Convert to fraction form
    64,685.80/89,262.66 = 36,389.80/x
  3. Step 3: Cross multiply
    64,685.80x = 89,262.66 × 36,389.80
  4. Step 4: Simplify right side
    64,685.80x = 3,248,250,344.87
  5. Step 5: Solve for x
    x = 3,248,250,344.87/64,685.80
  6. Step 6: Final answer
    x = 50,215.82

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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.