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Finding the Fourth Proportional to 64,290.81, 88,721.60 and 35,609.85

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Solution

The fourth proportional to 64,290.81, 88,721.60 and 35,609.85 is: 49,141.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,290.81 : 88,721.60 = 35,609.85 : x
  2. Step 2: Convert to fraction form
    64,290.81/88,721.60 = 35,609.85/x
  3. Step 3: Cross multiply
    64,290.81x = 88,721.60 × 35,609.85
  4. Step 4: Simplify right side
    64,290.81x = 3,159,362,689.71
  5. Step 5: Solve for x
    x = 3,159,362,689.71/64,290.81
  6. Step 6: Final answer
    x = 49,141.75

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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.