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Finding the Fourth Proportional to 64,900.81, 89,603.66 and 49,764.39

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Solution

The fourth proportional to 64,900.81, 89,603.66 and 49,764.39 is: 68,705.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,900.81 : 89,603.66 = 49,764.39 : x
  2. Step 2: Convert to fraction form
    64,900.81/89,603.66 = 49,764.39/x
  3. Step 3: Cross multiply
    64,900.81x = 89,603.66 × 49,764.39
  4. Step 4: Simplify right side
    64,900.81x = 4,459,071,481.67
  5. Step 5: Solve for x
    x = 4,459,071,481.67/64,900.81
  6. Step 6: Final answer
    x = 68,705.94

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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.