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Finding the Fourth Proportional to 64,780.88, 89,396.16 and 36,100.40

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Solution

The fourth proportional to 64,780.88, 89,396.16 and 36,100.40 is: 49,817.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,780.88 : 89,396.16 = 36,100.40 : x
  2. Step 2: Convert to fraction form
    64,780.88/89,396.16 = 36,100.40/x
  3. Step 3: Cross multiply
    64,780.88x = 89,396.16 × 36,100.40
  4. Step 4: Simplify right side
    64,780.88x = 3,227,237,054.96
  5. Step 5: Solve for x
    x = 3,227,237,054.96/64,780.88
  6. Step 6: Final answer
    x = 49,817.74

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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.